I dunno, I was in Japan in October last year, in Akihabara it was way more Hololive focused than Nijisanji, but of course i'm talking about merch/music being playedNiji probably won't implode as long as JP stays afloat. They can pull out of all the overseas markets and still keep their domestic niche given how they're bigger than Holo domestically last I checked, and given the sheer Japaneseness of how the company works I could see them genuinely deciding overseas isn't worth it. I won't pretend to know how VirtuaReal works, though.
Even the walls inside Don quijote are plastered with Hololive girls.