If you want to play an mmo with completely broken economy, try neverwinter nights online. That is a game without economy at all. The auction house is absoluteeee garbage. Nothing to buy, low level staff even at inflated price (we are taking about 2-3 items every week, nothing like in ddo) ... and the itemization of the game is also awful. Everything you get has the same stats or even worse stats than the items gotten at the tutorial. All items you get are also meant to be broken to get "essences" which eventually when you have played for hundreds of hours can be used to improve some gems you can equip, and levelling up gives you... stats boosts in the way of "+0.1% damage" "+0.1% evasion" Crafting is kinda cool there, but it's also useless.
Well, if you play a lot and level up a lot of levels every day won't you change of equipment every few days too even if the equipment is not lost?
Not necessary though that it was just in a few days, but if you were doing 400 dungeons with the same equipment, would not it make sense that it would get broken eventually?
Neither I said that equipment could not be repaired, and equipment has durability currently, but never saw an item impossible to repair so far. Only got weapons broken and repaired after attacking a lot of oozes. Maybe even currently durability is not so bad but still...
Typically my gear lasts me through reincarnations, not just levels, at least until it becomes outdated. I have a set for level 3, 5, 7, 10, 15, 20, 25, and then end game. Of course that's just one character, I'm working on gearing up or replacing old gear on other characters currently.
Besides, I'm not playing this game for reality, so whether it's 400 dungeons or 4000, so long as I keep my gear in good working order, I expect it to be there, not turn to dust. . .it is magical after all. . .
Of course, gear currently gets worn, but it can be repaired if it's blue named with no issues, or if it's bound to character (stone of change).
Now, non-named gear can be permanently broken if you don't bind it. But named gear can always be repaired to full durability.
I've played a game where the gear constantly looses permanent durability, mabinogi, and that was a pretty big complaint with that mmo. But, with mabinogi there was a more sensible crafting system too, so you could more or less make new gear from raw materials, we can't do that with ddo and it's current crafting.