Even they might be oldschool, they're just annoying to me.
They cost lots of times (bad for speedrunners).
They screw you, if you're on low health and you almost have beaten the dungeon. It's really a pain in the ass in Dragon Quest II since I can only carry a limited number of vulneraries in early game. In one single dungeon I run out of them. Whenever I want to return to a town to restore my supply, a random encounter gets me.
If it was a custiomized option (as it's the case in BD apparenty), it'd be fine for everyone.