I have to point out to people: The game starts to go into insane power levels at 15+. Most DnD modules are produced at lower levels than that, and it's considered "the sweet spot" for 5th edition.

So unless Larian want's us to go full on god mode, then 20 is a bit insane.

Currently thought I feel reaching lvl 4 went too fast. 1-3 is okey that it's relatively fast, because level 1 and 2 are considered the tutorial levels (many campaigns start at 3 because that's when the fun starts).