DinoInDisguise
A russian spy disguised as a t-rex.
We are concerned if they have given us any useful, practical method to stop the PCs nova everything and then recovering to full resources overnight.
By rule, long rests can only be benefited from once per day. So just put them on any kind of a timer, or under any kind of threat.
If the players do not know the number of encounters per day, they cannot "nova" because the risk will be too high. It takes punishing it once to solve that behavior forever.
As another poster noted. This is 100% on the DM.