macroplastic
There are a lot of interests I have which do not have enough users in communities here to make sharing things worthwhile, personally. Why waste time sharing art or music or other original content in places where it gets little engagement?
There’s a reason the front page is primarily covered in memes, news, technology news, and politics, and that’s because those require little barrier of entry to participate in for those tech savvy enough to already be here.
I think to trying meet all of these without compromises (such as privacy and performance) is basically impossible. How would one boost engagement on positive emotions or personalize without large data mining efforts, model building, and running text classification on every comment or post?
I agree they are good aspirations.
A few niche examples:
/r/generative /r/musicians /r/wildernessbackpacking /r/tropicalweather /r/analogcommunity /r/heavymind
Good luck convincing the non-technical users there to come here. This place is currently great for interests catered to programmers and sysadmins (speaking as one!), but artist and hobby communities are seriously lacking.