you see i think your forgetting that he also has been adding mostly non story related things and just systems that need to be added before he can progress the story. once alll the ground work is laid out vetex could probably finish the story in a year if he didn’t have to add all these other systems, that are necessary thoe. if anything 3 years from now AO is completely finished. a year from now we will probably be level 250 ish because he’ll barely start actually focusing on story related content. and as hes doing story content he still has to add alignment system which tbh idk when that will come but probably a year and some change. after Kingdom alignment is added i think thats a good sign that he will be mostly knocking out story content. but before kingdom alignment there is a lot of dark sea expansion. other small stuff like more side bosses and stuff. which i would package all together including the alignment update to take a year.
TLDR; Vetex finishes all non story related stuff in 2 years and the 3rd year he pretty much finishes making the game by completing all the stroy development. I say he’ll be done making the game entirely by early 2028.