Krita is awesome and getting traction, but most people are still on Photoshop.

How does that have anything to do with viability? If you are an artist and there is an amazing tool with a fairly big user base but not as big as photoshop how does that stop you using krita in any way?

Its not viable if you ignore all the ways it is viable.

The discussion is about visibility, not viability. The opening post says:

>open source is not that visible in the graphics/animation space