I wouldn’t bet on that, you’d be wrong.
Caldera Open Linux 2.(?) back around 98/99, for long enough to download Slackware and Win98SE.
It’s even easier to prevent confusion if you use /dev/disk/by-id/ id’s, it only took a few times of overwriting the wrong disk to figure that out.
I’d suggest trying out Bazzite Linux. It’s the closest to SteamOS and has a lot of tweaks already installed.