I kind of did that with PowerBooks back in the days. The hard truth was that used Thinkpads were a better option. For the same price you could get 3 years old

I kind of did that with PowerBooks back in the days. The hard truth was that used Thinkpads were a better option. For the same price you could get 3 years old ThinkPads which were more powerful and in better condition than 6 years old PowerBooks. But I did installed Gentoo on my PowerBooks G3 and G4 (it just took 2 days to compile Firefox). And ironically, this knowledge proved useful in my first job when I repurposed old IBM Power servers with it.