>>7766112
That's definitely true, but I'd say it's more of american supercorporations being a black hole that sucks everything into the same point and creatives not having that strong connection web that would keep the scene alive either way. Again I'm talking as an outsider, but it seems like pre-2000s the american community had an actual creative passion that came from fans getting together (I don't know anything about it, but I just found out about Elfquest and it seems to be a sympton of that)
Let's say for whatever reason most japanese magazines decide on reheating Go Nagai and Ishinomori stories ad nauseum, I really struggle to think Japanese manga otaku wouldn't stick around and build close nits communities that allow them to do the stuff they like that the market doesn't cater to. Hell that's what Comiket is supposed to be to begin with.
On the american side, it's probably a compound nuke of corporate interest + clout chasing + it takes a lot of dedication to do a project on your own + said project won't have a pre-decided audience due to current "nerd culture" just being "culture" (desu I think the current movement away from visual novels and into phone gacha is an early sympton of that on the japanese nerd side)
A complete shame overall