I'd say that the genre is getting back on it's footing for a while. I might talk about the reason why it fell off, but I'll getting ahead of myself.
I'm curious to see your take on it.
This isn't unique to Touhou (shocking I know), almost every fanbase has an wave of "secondaries", but this is very notorious. And I know for 2 reasons:
One; the games' themselves are very limited, you can get them on Steam, but the bugs and crashes are really showing, since it wasn't updated when it was released, by that, it's almost unplayable unless you're on a old computer. The only way you play these games (and on english) is either get them on the internet for free with patches to make the game in a playable state. Since piracy is getting normalized again on the internet, this won't be an issue.
One of the main factors, definitely, I agree. However, the difficulty of the franchise doesn't help the average man to get into the games as well. Of course, we have many talented players here that would disagree with this statement, but I'd say that the average gamer wouldn't be able to finish most games without 30+ hours invested in it beforehand.
But the second issue is more akin to the community as an whole than the games' themselves, I'll repeat what I said before from an previous thread, the community wasn't perfect since PCB was released, meaning that the fans just didn't cared to play the games and focused more on the characters themselves, the lore and whatever. And it's fine to focus more on other aspect, after all, it's not just the gameplay what keeps it afloat.
This second reason is why this franchise survived imo. World building beat the gameplay.
One notorious example of this phenomenon is Pathologic. It's a game, but the gameplay is ass. Walking simulator where you're getting fucked over by everything you encounter. It is a painful experience, however, the story, the setting, the characters have made the game so memorable that it received a remake in 2020 iirc, Pathologic 2.
It is interesting how the main aspect (playing a game) can be ignored and forgiven, if the other aspects of the game are great.
And the entire waifu culture is EVERYWHERE, it's not exclusive to Touhou and as long as you have a attractive characters, there always be people who fall in love with said character, and most of the time it's not an big of the deal and the ones who's uncomfortable about it, it speaks more to the person than an entire audience.
Waifu culture is one of the worst things that has happened to online media. I'd say that if we as a community condone this sort of behaviour, it also speaks about us.
Revitalization can be interpreted in multiple ways. Bringing back inactive members to participate again or bringing in new people. The former is more easier to achieve, the latter is definitely harder, especially with people in the community that I spoke of. Those that come through that filter will be either similar to them, or those with high tolerance for questionable behaviour.
What sort of revitalization do we want and what sort of people do we want to join us?