AbdulAlhazred
Legend
Not really. An AD&D troll maxes out at 25 points of damage in a round. It's a typical enemy for a 5th level party or so - and even a 3rd level fighter can fairly easily take that, at least for one round. And, note, most monsters, outside of maybe a few very high level outliers, max out their damage at about 25 points per round, maybe 30. And, again, we're talking a fighter with probably an AC of 0 by 5th level (full plate and shield is 1, give a +1 dex bonus with a 15 Dex - not unheard of), the troll is only hitting about 1 in 4 attacks.
Sure, at 1st level, you could die fairly easily. By 4th or 5th though, it was hard to kill a PC in combat. Again, the plethora of SoD effects greatly ramped up PC deaths. Heck, even a small giant spider had a death attack. But death by HP? Not so much.
Eh, you will not want to get anywhere NEAR a bulette then! They have a max damage output of 84 points, and with 9 hit dice that's a hit on AC0 on an 11, so even the AVERAGE DPR is more than 25. There are quite a few other examples, and MANY creatures that can get a bit lucky and do 40 points to your level 5 fighter, which is pretty much fatal (even granting a +2 CON bonus and maxed level 1 hit points you still only have 40 at level 5). This of course all assumes you are getting attacked by ONE monster, but with common monsters having No. Appearing up into the 100's that isn't a safe assumption.