>>158297671. twitch is a smaller platform in japan. i.e. less chance for new japanese viewers
2. twitch is a worse platform for mobile devices, a large portion of japanese viewers watch on mobile
3. twitch is a dog shit platform for vods, vods are say what you want good for discoverability and income on youtube.
4. if signing a contract (can't remember if it's partner or affiliate) you cannot stream on other platforms. This is a small negative though, since Hololive are unlikely to sign such a deal.
5. Karaoke might be even more fucked on twitch then on youtube since their dmca system is harsh to say the least due to the music apocalypse that happened in 2020.
Some of these points are less important for EN, but some do still apply. I would say it's even more detrimental to ID due to mobile watchers being even more common there.
Should they still swap? Maybe, but it's not such a clear cut "just go to twitch" as you might think.
