there was supposed to be a painter 2.1 including linux support and udim. Now they're calling it substance 2020? Hmm. Granted, I haven't downloaded any updates lately so I'll have to check. I just want udim support so I can finally buy out my perpetual license and be done with the subscription, lol. They're ending perpetual option next October last I read so time is ticking, and really don't like painting in zbrush cause it requires working on multi-millon pollys and makes my machine groan.

https://www.digitalmediaworld.tv/s-ware/883-substance-painter-2-1-supports-linux-and-udim-textures