What old MMO feature deserves to make a comeback?

Today’s Daily Grind comes to us from Kickstarter donor Diskonekted, who asks one of the genre’s million-dollar questions:

What features or technology from older MMOs are you most surprised to see never expanded upon or commonly implemented into new games?

Sidekicking! My goodness. It’s a crying shame how few level-bound MMOs have picked up on the brilliance of sidekicking (or mentoring or level-scaling or whatever you want to call it). It’s such a simple, elegant solution to solving the problem of keeping people playing together (and paying for your game!) even when their time investments vary dramatically.

Sidekicking isn’t the only one, though. Let’s tackle Diskonekted’s question. What old MMO features are you shocked aren’t being used more in modern MMOs?

TH

i'd say world pvp without penalty but actually with reward to encourage it.
and obviously player driven market would be great just like in biosfear where it just trade windows and you the players decide the price.

Flying and gliding as found in Aion. Added a whole new dimension to PvP in the open world.