NaturalZero
Hero
Possibly, but I find that the 5 minute work day is as much a function of having players who shoot their load at every battle or lots of players running character who regain a lot at every short rest like warlocks and monks.
Both of you are right it can change the feel of combat, it makes it more dangerous and makes players act less reckless. Oh and everything that happens to players is in the hands of the DM, unless it is in the hands of the dice if your are a DM that lets the dice lay as they fall and doesn't fudge them on occasion.
In the end I just really really dislike going to bed with 1hp and waking up with 198hp the next morning.
The effect of more serious long term ability score damage though, is essentially an extreme version of the 5 minute work day. Your party has one bad fight, and then players are encouraged by the mechanics to take a break for days or weeks to fully recover, just like real-life soldiers or athletes. You are basically forcing the players to "shoot their load" of hit points AND the spells slots needed to recover them by reducing natural healing from the default rules. The result can sometimes be a 5 minute work week.
I agree with others suggesting that you just tweak the amount of healing you get from a long rest, but you may find that players are more likely to sit around for a few days instead of continuing the plot in order to get back to 100%. If that's how your table likes it though, that's all that matters.