I also sometimes find myself manually saving in Word or Excel, even if it autosaves. So I understand your paranoia 🙂
But in Word/Excel the saving only takes as long as the click takes. Revit takes a few seconds during which you can't use Revit. This is annoying and I see how that prevents someone from saving "too often". I realize this is based on file size and network speed etc.
That is why I would hope an Auto-Save in Revit would work in the background while one still can use Revit. Basically, unnoticeable instead of pausing Revit every 15 minutes for a few looooong seconds.
I think OP learned their lesson the hard way. Sometimes that is the best way to remember the lesson....
Revit Version: R2026.4.2
Hardware: i9 14900K, 64GB, Nvidia RTX 2000 Ada 16GB
Add-ins: ElumTools; Ripple-HVAC; ElectroBIM; Qbitec