Thomas Shey
Legend
This is a good point. Already in my 5E sandbox, u am running into the problem of PCs leveling up too quickly. They are going to level out of their "zone" before they ave a chance to explore it.
I had this happen back in my 3e campaign. I'd not internalized the difference in both advancement speed and how much stronger level differences could be in it compared to, well, OD&D, and it showed when I tried to design an extensive dungeon which I subconsciously expected them to, maybe, level once during when as I recall they ended up doing it four times. That was, to be charitable, a problem.
(Not that this is entirely a problem of just modern D&D style games, but in the Ancient Times it was more likely to be the opposite end when, especially when using outdoor encounter tables to populate areas, PCs could all too easily accidentally wander into areas where they really weren't up for the job if the GM was not up to proper signaling, and, well, most of us were new to it...)