Re: "GPL is cancer"
... and yet almost all of the commercial IC CAD software runs on Linux. Apparently they don't have issues, key libraries are under LGPL, and the fonts are fine.
Probably though this is because these packages previously ran con commercial Unix so Linux is the mainstream successor. Meanwhile other commercial software that didn't previously run on commercial Unix (e.g. Adobe software) don't run on Linux either.
So this is more of a Linux/Unix-family versus non-Linux/Unix split. Not GPL.
Even software that needs to include Kernel drivers such as VMware seems to manage to ship a commercial package without GPL issues.