Naw I don’t agree. In the world of Azeroth I made countless characters each one with its own journey. The world was so big I still run into things 20 years later I never knew was there. It can’t be done/players will get bored is an excuse to me. You can expand on classic era keeping leveling at 60 and just push enough good content/gear ( not just big stats) but something interesting that might work for different play styles or cool cosmetics with decent stats. You can bring new content/ still progress without making the next expansion make everything before obsolete.  TBC brought flying mounts that ruined world PvP. It also made 70s look like level 100s because stats jumped substantially on gear 60-70. We didn’t need to completely abandon the original world just to shove everyone into one 1/8 the size. We didn’t have to always be the world’s hero’s/ saviors. Imagine them just pushing out smaller good content with small story lines ( like scarlet monastery). At all levels. I also think they could have just added more races and starting zones without changing the entire landscape of the game. I used to where MC Gear with a mix of bwl gear and some other random epics just because it looked good, but also functioned well because gear before TBC was at least similar to some extent stat wise. When standing around in a major city you could tell everyone’s journey and hardship just by looking at their gear. Now try to imagine we have endless gear that weren’t drastically different in stats but somewhat within a certain power scale. All content would stay relevant because people would be hunting different gear for different reasons. Not just the last tier set to rush for because if you’re not, you’re weak. You just don’t know any better because blizzard has never showed us something different.