Yes, the situation seems endemic to our site only with only 60-70 users between 2k and 10k reputation points. On top of that, not all of them are active Q&A contributors which aggravates the problem. The situation is so bad I can easily count on my fingers the users who participate on the site regularly and visibly (to others). I also know that we have the second lowest percent answered rank network wide. So, I understand the gravity of this situation well enough.
So what I can do as a Moderator to ameliorate this situation?
First, we must grasp the reality that we are not a site oriented strictly to professionals (which makes us different from SuperUser which shares the same motto with us), and that acts as a problem. We are a site oriented towards consumers, who do not care about anything our community needs, expects or wants (and why should they, as we are, too most of them, just an online support). On top of that, the consumer base is incredibly big, something Apple.SE doesn't have to deal with, so despite sharing the same motto, it is we who are different!
Being an enthusiast is a hobby, not a profession . You can be an enthusiast when you are young, in school or college, or have a profession giving you ample time to spend your time on your hobbies. But once life kicks in, enthusiasm fades away or has to give space to more serious things in life. (Movies.SE and Travel.SE are no different from us in this regard.) It happened with me too, when I could barely post 30 answers within a span of 12-13 months, with nearly no other contribution to the site in 2016-17. Even two of our veteran Moderators recently left (one is due soon) because they just couldn't maintain the same level of enthusiasm or perhaps, couldn't find time for it.
We are an anomaly. We have survived and thrived, to an extent, for 8+ years. We have to adapt accordingly, and we may not be able to meet all the criterias other sites in the network do, in terms of overall performance. A mature (in terms of age) generation prefers more signal over noise over time, so they can easily see the benefit in sticking up with this site than the various forums out there, provided they can find time. So we need to actively target new and young blood, provide an atmosphere where they can thrive without deteriorating signal-to-noise ratio beyond a point, contribute here, and possibly, make them understand (action speaks louder than words) the merit of contributing here than elsewhere.
Some hardcore power users cannot join us such as Magisk (topjohnwu), Xposed (rovo89), GravityBox (CEC0) et al, because they develop things so they need feedback and for that, forums are much suitable. We have to aim for users who stick with former's products because they are often power users too and many of them are willing to find solutions technically and simultaneously help others. They are the same people who sometimes stick up with forums for quite some time, despite the various structural shortcomings in their forums.
I really do not know why this latter category of users do not come and hang around on this site. Do they not know about us much in general or do they fail to find content useful to keep them here, or do they like a community more on informal side?
I can't change people's taste. All I can do is help in increasing this site's visibility and improving its content. I have always believed that great, insightful and helpful content drives, attracts and inspires people to help others, as it inspired me to stay here and see merit in this site and the whole network, in general.
Hence, since my beginning here, I have tried some reasonably doable things, in my capacity as an ordinary user.
First and foremost is the quality control of this site. It is no doubt that Google search often, if not always, links to our site in first few results when searched with Android related issues. I have sometimes made well written (i.e easily comprehensible) answers, even both Q&A, with that thing in mind. I have also heavily flagged, close voted (explicitly, and not much through review queue though), and edited posts. And I could continue to do this because the Moderators did their job well enough despite the workload of this site and their life.
At other times, I have been around subreddit Tasker, whenever time permitted, and linked to a Q/A of our site's wherever felt appropriate. This part is something our very active users with active presence here and on other forums can do without explicitly making efforts.
On the part of maintaining that user base, I have became somewhat liberal over time in dealing with noise, whether flagging it, or reducing my expectations for upvoting, when I calculated the contribution a user seems to be making, just to help in providing an atmosphere aligned with their taste.
I really don't have a pompous offering of organising some virtual or real-world event to attract people, because I have been doing aforesaid things all alone (and I know some users who do it better than me), on my own initiative, to make this site a more better place for me and fellow users who shares the same passion like mine.
So honestly, I conclude that Moderators don't really have much time, because they are regular users like us with added burden and responsibilities. We can chill out, don't return for long, but they have to think a lot (I believe) to do just that. So there is not much they can do within their free time reserved for this site, especially when they are working professionals and have a family too, except to do their job well enough, efficiently and in time. As long as they clear the mess swiftly, amicably, and maintain good will with others, the burden of the responsibility actually falls over the shoulders of us, the community, together.