Fly to Ruuan Weald, then go down the ramp until Gruul in Blade's Edge. You can travel to Cosmowrench from WOW Classic TBC Gold Netherstorm. I'm not sure. I feel that if there were no flying mounts flying paths, these would become important again and fill the gap.

If Blizzard developed WoW today the game wouldn't even be called WoW. It's most likely to be an Overwatch MMO, or something completely different. They haven't really done anything in Warcraft in a long period of time (besides hearthstone which could be a different game).

If we look at Overwatch with what could be possible with Project Titan and WoW and what might have happened had WoW had been released in 2021. I would imagine that WoW2021 would have been constricted to buy WOW TBC Gold some half-assed BGs as well as some Arenas and loot boxes.