A couple of thoughts on the subject.
I do think that what I learned in the 1980s & 1990s on the PET, VIC-20, C64, Amigas & MS-DOS systems has benefited me. On occasion I've had to do some strange things with modern computers that involved entering command line parameters, etc. and it's helped.
I used to get depressed and feel old about changes in technology. But then I just came to accept that old computers like the Amiga get old, but they still remain valid tools in their own right.
My Amiga is old, but can do some very useful, fun and impressive things. It's a tool and in the hands of creative people, even an antique tool can do amazing things.