@teto artists which I know say no to Linux because they need Paint Tool SAI and Clip Studio Paint, which don't exist on Linux.

It may be their fault that they depend on such software, but the fact remains the fact: their tools don't work on Linux and alternatives which available on Linux do not cover all needs. For example, Krita still can't open .sai files. None of them can open PSD with compatibility parity. Office software has some problems too, although I dunno what's the situation in that field.

At least it's not so bad with games, it's even getting better.