MOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOM!!!!!!!!!!!!!
Obviously, save on exit and delete the save upon loading works well enough.
So you propose two systems simultaneously:
1- limited saves
2- save on exit
This creates problems.
1- Limited save is
a game mechanic that requires
meta knowledge, which I hope you won't debate that it's bad.
2- It can result in situations where HOURS of gameplay are lost. Which is always bad.
3- You're always stressed, debating internally whether to save now or later, always trying to guess what's going to happen, instead of just playing in a relaxed manner, knowing you can always revert back if your char
dies. The point of the game is not to ALWAYS BE ABLE TO AVOID DEATH (or get punished by losing 3 hours), but to enjoy the world and your character's life.
Kingdom Come tried limited saves. Then caved in and released a fix 3 days after release. Limited saves is system that tries to fix something that's genuinely problematic, but only introduces more problems.