Being fully-invested in one distro in the first place seems like an old-school approach to me, and I'd assume that, with distros like Alpine and BusyBox (maybe even throw macOS in there), it's more common for most people to deal with multiple distros than they're giving credit for. I've more or less gotten used to the cycle of figuring out which launch system and package manager I'm dealing with for any given system and having Google/StackOverflow open for the things I forget.