/vt/ has been the biggest newfag portal to 4chan by the virtue of being the only real forum for English language vtuber discussion on the Internet. The alternatives are Twitter (dogshit for actual discussion) and Discords (not public, chatrooms, full of self-important trannoid mods).
It's essentially replaced /pol/ of 2013-2017 as the newfag honeypot. Generally I think it's a positive thing for 4chan as a whole since at least now the newfags are generally weebs instead of retarded culture war activists and boomers who got banned from Facebook for calling for Hillary's execution.
When moot left 4chan in 2015 at the height of /pol/shit taking over he gave this answer about 4chan's future in an interview:
>What effect do you think this will have on 4chan as a community?
>4chan has gone through different arcs in its lifetime. I think maybe, with a Japanese owner, it'll go back to its roots. When it started, in the first two or three years, it was very much steeped in Japanese culture and anime and video games and people who were hobbyists with a keen interest of Japan. And that gave way to what we think of as the golden age of the /b/ random board where it became this progenitor, this wellspring of internet culture and memes and whatnot. I don't even know what I would call the third or most recent arc. It's settled into being a broad image-centric discussion site. But I wouldn't be surprised if 4chan goes back to its roots and doubles down on just being very nerdy and some of the activist tinge moves on to communities that are better suited to that.
People back then laughed at him since literally nobody thought /pol/ would ever leave but /vt/ kind of drew in a new audience that's closer to pre-/pol/ 4chan.