But it plateaus. The only thing that really makes you stronger is the fact that eventually you will be able to outlevel the content, and level doing lower level zones. At least until the late game zones.
I mean, sure, I get a more powerful spell after a few levels, but it’s a false benefit. It only feels more powerful because the spell was being held back. In modern WoW, the spell isn’t held back - it levels with you. The reason a new spell “feels better” in Vanilla is that you were constrained in the first place.
In BfA, “leveling” doesn’t not make you feel more powerful, but then, the 10 levels to 120 and the week it takes to get there, honestly, that’s not leveling. That’s not all there is. Dinging 120 opens the game up. NOW you get to start leveling. NOW you get to start accumulating “real” gear, plus the AP and Azerite powers.
120 is a bookkeeping problem, and is almost unrelated to actual character power. That’s iLevel and the Azerite powers.
Character level hasn’t been really important in that sense in some time.