copy file.txt prn was an interesting shortcut for printing things 35 years ago.

The Linux equivalent of that is cat file.txt > /dev/lp0. It still works if you have a parallel port printer that accepts plain text.

I’ve never tried it, but you can use UNetbootin to do that.

RAM that’s hogged by windows is wasted RAM. It should be used by programs and for caching.

The Pi 4 & 5 are no good for tinkering anymore, but the Pi Pico microcontrollers still are. I just hope they don’t screw that up too.