When I was at Oracle in the 90s, I was constantly having to sit down at someone else's machine (this was before covid, of course). And there were zillions of Unix versions, not just Linux. You couldn't even count on emacs being installed, but I drew the line at learning vi, other than :q! If they'd been editing, I'd ask them to save it.

What that meant is, whatever customizations I had on my own machine were not available. I had to learn to work with the defaults. This is liberating. I recommend it.