> At my CS program, there was a saying that when someone asks you what programming languages or frameworks you know, you say "any", because you are being taught foundations that will let you pick up any language or framework that gets invented (barring some massive revolution in quantum computing or P=NP or whatever)

This is the kind of thing that sounds great within the purely abstract world of an academic bubble, but falls apart at first contact with reality.

It's important to learn the foundations, but that shouldn't be treated as mutually exclusive with learning practical skills.