Why was AV 1.12 not used for the 15th anniversary version?

Another reason it would have been better to simply use 1.12 AV, as the data existed already, and the anniversary was to be a limited time event. Why put all of that effort into a version that they thought was lesser, by their own words?

Why put that developer time into it at all, if 1.12 was the better vanilla version?

By the by, if you do not want to partake in the discussion because you do not like the subject matter, nobody is forcing you to read it.