In 2e, level 1-3 characters died like flies. No max hp on lv 1 and roll for hp means even fighter can have naughty word HP (seen couple of them). Also, hirelings are not mindless automatons that obey every command without question. They have self preservation instinct and will flee or just refuse to go on adventure if they think it's too risky. In 3.x, crit multipliers were culprits mostly. Even with max hp at level 1, low lv characters are kind of squishy ( specially d4 HD classes). Also, roll for hp didn't help. On top of all that, in every edition, bad luck on player part, good luck on dm part, bad tactic on player part, biting of more than they can chew, etc. But point is, prior editions characters tend to be on the soft side first few levels.
That was not my experience in 1e or 2e. Just goes to show that everyone played the game with different expectations and styles.