You could often recover magnetized CRTs with a degauss device.
Oh man, fun times!
We still have some CRTs at work, as the way a CRT functions is integral to how the instrument analyzes and displays samples. It really is an interesting old technology. And, think about how long CRT was the ONLY TV tech that was available! It had a loooooong lifetime.
I sometimes wish I still had a CRT, simply to play vintage games in the exact way they were designed to be viewed......but then I think about how big those things were and maybe that isn't such a good idea.
And, light gun games only work on CRT tech! There are a couple of modern options that let you play such games on modern TVs, but it is more of a workaround.