His side last month was...
"Well remember that architecture i was pushing for 2 months ago.. I don't want to use it anymore... I realized it it was not for this company... It requires a full time work on the DB that fullstack developers dont do..."
Translation. After realizing he as alone on the boat of maintaining XML and SP, plus realizing the non re-usability of his architecture he quickly changed his tune. Trying to save face about it, but after giving me 1 moth of unnecessary headaches of "Why don't you want to try new things? Why are you so close minded"??
Mind you my main argument was SQL xml work is not OOP, just string/xml manipulation.