Linux tools have been slowly improving.

Winders and Pineapple tools have been slowly degrading.

So, although the big name tools had a big head start, there are only a few tools left that i would pay for. And actually i prefer to use beta linux software instead.

BUT! For drawing, Krita is soooo much better than Photoshop.
And many other tools are right up there.

Soon we will see the big name stuff trying to play catchup