I usually just harvest usable parts like the hard drive and camera and call it a day.
Alternatively, if you’re able to plug an external monitor in and get it to work for setup, you could install some sort of Linux distro on it and run it headless for lots of different purposes.
Yeah it’s relatively easy to reuse most webcam cameras, you just have to get them connected to a USB cable, then most computers will immediately recognize them as cameras.