It’s mind boggling how much more power-efficient computers have become in the last two decades.
It’s not that new PCs are less power hungry than old PCs. It’s that all the computing power of a big old PC can be had on a tiny cheap board that runs on a battery.
https://lobste.rs/s/embgla/one_less_un_xy_option_for_32_bit_powerpc#c_qywexy