/vt/ - Virtual Youtubers

There are big famous duos like Downtown or Penn & Teller that make a point about how they're able to stay as best friends and keep their act going so long is because they don't really hang out when outside of work hours. Sure, there will be just as many exceptions, but pairs like Kiara & Calli and Ame & Gura may like to reduce their time doing one on one collabs to help preserve their off-camera friendships.
Also, the smaller channels can easily get a complex over being the sidekick/love interest in the eyes of the fanbase, so may want some distance to stand on their own two feet.