We are moving from CentOS 7 to Alma. Has been tons of problems with incompatibilities, but I'm not part of the work so I'm not familiar with the details (= could be our own engineers).
I've never taken a typing class so I learned by own way. I'm a decent typer, probably closer to average but nothing that blocks my everyday work. Anyway, I'm right hand dominant but had no idea about a thumb rule for space. I always use left thumb and you can clearly see on my keyboard how the right side of the spacebar is barely used.