So I'm sure this is news to nobody but basically there's been a huge inflation in cost for various things, vendor mounts for example now cost hundreds of thousands or millions of gold, and there's literally no way to make that kind of money in battle for azeroth. Nothing is worth anything. Gathering profs are worth nothing because the auction house is flooded with mats already, leveling a char 110-120 and selling everything along the way nets you maybe 2k at best, the gold from the mission table is absolute trash, etc. The only way to make gold now really is to be in a guild that sells mythic runs, being someone who spends all their time working the AH, or buying game tokens. The majority of people sitting on massive reserves of gold made it in legion and if you didn't make a ton of gold in legion you're kinda just shit out of luck.
I'm not saying everyone should be able to afford a 5 million dollar mount but there's literally no way for an average player to make anywhere near that, even these 90k rep mounts are out of reach for most people. It's beginning to parallel the irl economy at this point lol.