I agree that these kind of fights can be fun, but IME they have a bad effect on the game overall. They force the dreaded 15 min adventurers day, they necessitate well-built characters, and they foster a DM vs players atmosphere.
Personally I prefer adventure design that leaves place for quirky PCs, inefficient strategies chosen for RP reasons, and many encounters between rests.
Well keep in mind that this is because of the cheap existence of wands (another reason why the casters in 3e are so much stronger).
Without wands of CLW, in pre 3e D&D, you could have a series of encounters that only took off 10-15% of the HP of the fighter but it would be tense as there was no way for the fighter to get back to full HP without the use of the cleric's actual spell slots.