You won’t have to go from one expansion zone to a zone in another expansion to level up you can do it all in whichever one you choose.
For a (new?) player to play through the game in chronological order, it is as I broke down earlier. 1-25 for vanilla, then 4.1 levels per expansion, and then a massive 10 levels for Shadowlands.
What you’re suggesting is that all the content is meaningless and irrelevant.
There are so many contradictions from people it’s amazing. People saying the number is arbitrary and irrelevant, yet spending time arguing with those of us who the numbers do have meaning for.
if the numbers have no meaning, what do you care? Why are you here responding? Go away, and get back to grinding through “meaningless numbers” and content you don’t care about, that you’re glad you can skip through on your way to increasing meaningingless numbers.
Those of us who do care, are allowed to voice dissatisfaction with a paid product we’re purchasing.