In OSRS, before bonds (their equivalent of tokens) were released, there was a strong gold industry, but most people who bought gold did so by buying bonds on the main game, then finding a dedicated 'swapper' who'd exchange their RS3 gold for an appropriate amount of OSRS gold (taking a cut for themselves, of course). I wonder if a similar system will pop up in classic wow
You create a meta where you're constantly buying gold. Gold is very important in vanilla consumables are the difference between being a hardcore raider and being a casual. The notion that wow token doesn't create inflation is incorrect. By giving every player the ability to buy gold you're increasing how much gold your average player will have. the 1% rich player who has the ingame gold to buy these tokens was not trading with that gold. But now they buy ingame time and the gold that was sitting in their pocket is now being used to trade, buy items, herbs, etc. now there's more gold in circulation. Now everything costs a little bit more gold. And if you're a player who's not buying wow tokens with real life money you have to farm just a little bit longer to compete. That's why wow token is bad.
This is something that people really need to start to understand, not just for Classic or WoW but software developement in general. Fixing a bug isn't just flipping a switch or changing a single digit. You have a machine with literally hundreds of thousands of parts, designed by dozens of different people at different times over the course of 20 and more years. You change a single thing and it might break 50 other things in very subtle ways that might not even emerge until months later (i.e. the very high M+ keys some players got at the start of BfA).