Yes, that's true but after the 1-20 run you leave for the Isles, Paragon City or First Ward. The rest of your run could take place after i23 in First Ward, Second Ward, The ruins of Pretoria (lots of stories about surviving in the post apocalyptic wasteland that you could do (That was one of the costume sets they were working on after all).
Understand, I know all this is extremely remote, just it would be cool if it could be done.
I suggested modders mainly because they work mainly for love of the game, not money and so many games have hugely extended lives because of them. Just look at Morrowind and Oblivion, both still have active players years after development ceased. Modders keep finding new ways to interest the players. Of course Devs would have to vet anything that would even be considered being added outside of an AE environment, but it's not impossible.
This thread is about daydreaming after all!