But, I can’t go see AI play a guitar, bass, drums, violin, cello, etc live. That will always require people. Hence the ‘live’ part.
I think that thinking could be a bit naive, it may not be completely wrong, but being able to create an AI controlled robot to play any of those instruments like a virtuoso in a humanely imperfect way is not just a possibility, but it's probable.
The way I see it mini expansions will be similar to past living world episodes in every way, just we need to pay a price upfront & there won't be more freebie maps. If Anet comes up with some cool expansion defining feature, I think they may make another "big" expansion yet. (I would take a long wait over useless, super forced features like the Jade Bot)