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The main problem with old computers is the amount of RAM available (they were sold in a era where RAM chips were expensive)

:')

I'll be fine using mint... Right?

Probably! Best way to find out, is to just try it out :)

Y'all are good at making this sound very complex.

Fwiw, this isn't really aimed at people who are just dipping their toes in. Enthusiasts in any field can sound insane from the outside in