“This tree removes ancient-386-CPUs support and thus zaps quite a bit of complexity […] which complexity has plagued us with extra work whenever we wanted to change SMP primitives, for years. Unfortunately there’s a nostalgic cost: your old original 386 DX33 system from early 1991 won’t be able to boot modern Linux kernels anymore. Sniff. I’m not sentimental. Good riddance.” Almost 21 years of support for a professor. Not bad.