Free non-commercial and non-free commercial software are both wildly different products in practice. I installed some package recently that fucked with my X config, or my kernel modules, I don't know. But my hybrid graphics is now fucked and I have crazy artifacts all over my screen. The default install of this distro does not result in a working config, and I had to spend three days to figure out the insane set of s…
And really, this has nothing to do with free software; there are even more horror stories like this about Windows and macOS and those are both proprietary systems.