I got trained to automatically save my file at every single pause in my typing. Finish a sentence? Command-S. Minor edit? Command-S. Paste? Command-V, Command-S. I only noticed when I moved to another computer and muscle memory stopped working.
Growing up with home computers in the 80s, I still have this habit. I suspect (without evidence) that it's pretty common. :)
Linux users of a certain era had to overcome compulsive use of 'sync ; sync ; sync' for much the same reason.
You'll never hear them while doing work on the machine (unless you had it opened up and trying to figure out why it wasn't booting).
This was early-90s, maybe 1/4 of the folks in my dorm had personal computers. I spent 4 days using other people's machines while they weren't, because the labs was already booked solid, and still had to take an extension on one paper.
In conclusion, I like preemptive multitasking.