I've been using GNU/Linux exclusively since 2012 and while I've seen fewer kernel panics than blue screens, I have seen some. Usually due to the Intel graphics driver (of all things). I don't recall ever having one caused by AMDGPU, but that may just be a lucky coincidence. But every OS has problems, my favourite one was OSX Yosemite hard rebooting whenever I ran a Xubuntu VM on VirtualBox.