Thank you for your reply, your post have a lot of good points.
About the state of current game industry, totally agree.
About shifting from PC to phones, somewhat agree, but it could be easily solved if most people would use ExaGear or Winlator or Mobox (if you have a potato phone like me you can play most PC games from 90s and early 00s without problems, if you have a good phone, well you can try to play Elden Ring and Cyberpunk 2077 in 20-30 fps. And yes even this potato phone can run mainline Touhou games from 7 to 12 in 40-60 fps, from 13 to 15 in 30-50 fps, from 16 in 25-50 (I believe in ECL supremacy)). But the problem of those emulators that they are not too convenient (and not stable with some games).
Totally agree. Especially with that finding things is harder now, if you don't know about them. So that is the reason why I began making a list.
I don't agree with Dead Internet Theory, because if you don't use Twitter or Reddit you won't notice these problems (except TikTok-like algorithms). I somewhat agree that there are some places each you couldn't reach using search engines (I think Discord developers wanted to make Discord servers more private than for example Facebook groups).
About mature content, it is not a big problem of Touhou (in table you gave there is a mistake, in Touhou line it should be 8,29% of R18, still it is more than the previous time) because R18 is a big part of doujin scene (the biggest doujin archive I know (>400TB) mostly consists of such stuff, also a big number of games for PC98 are NSFW). It maybe shouldn't be that accessible. What I think is bad that Touhou fandom has one of youngest audience (in average 25 years old).
I don't consider Memories of Phantasm as a big problem because it was made for fans (if don't like it you don't have to watch it) not for newcomers. The problem is that most fans and newcomers don't understand that, so fans recommend newcomers to watch MoP, and you know the consequences. The only somewhat good alternative is Summer day's dream (if you forget about the scene with Patchouli). With LW and Reddit agree.
About Twitter, it is a problem of its design. open-source alternatives also have this problem, for example misskey.io . I could say "don't use Twitter", but the problem that a lot of Touhou content creators make announces there.
About Pixiv and boorus somewhat agree (but what have you expected from them?)
Agree.
About recent games quality, agree. I could say that if he needs 3 years to make a game we can wait, but HBM and UDoALG look like they were made in less than half a year.
About TJD not really agree it surpassed my expectations (I expected nearly nothing from it). From what I know even the haters say this album is the best thing ZUN made since 2017. I can only agree about the story.
About the gameplay mostly agree (in UDoALG card system isn't abused. Borders, Charge 2 and Charge 3 are).
About Touhou 6-8 ZUN says that he cannot place them on Steam because he lost source code (keeping in mind that he doesn't update Steam games it is hard to say it is main reason) (also imagine installing Steam version of Touhou 6 and not be able to launch it because of locale and Windows 10/11).
About your plan, I agree with "General Touhou Supervisor" thing but I don't agree with even more commercialization, I don't want Touhou to lose the remaining "doujiness" it has.
About "new multi-platform bullet hell engine" you are too optimistic about ZUN, he wasn't able to implement replay system in HBM and UDoALG while you are talking about other platforms (which for example don't have DirectX support, which means ZUN would have to learn how to use OpenGL/Vulkan and write a new graphic system from scratch). "finality to the Hifuu Club story-line" would mean the final for Hifuu Club, which means ZUN has to make another story or there would be no more albums with stories. I think ZUN more prefer not ending stories, so I think we won't see the final soon.
My idea is turning Touhou into folklore (I think SCP is a good example of internet folklore). (I described my vision in PS).
I don't know about Pokemon, but for me it isn't hard to avoid such content, because I rarely visit places where I can find it.
The only problem that monsters don't avoid child content now. Aside that it is a good example.
Agree.
As I wrote I also work on the list like that (it has more than 14500 links now). If you have something to share too, please DM me, so we can try to merge our lists and combine our efforts (I hope together we can do much more).
But if we manage to gather a lot of people and attention we may hope for "The Place" be a thing.