Can a 1 year multi-entry Non-O retirement visa be extended for another year in Thailand, similar to a 90-day single-entry Non-O visa?

A 1 year multi-entry Non-O retirement visa can be extended for another year in Thailand, just like a 90-day single-entry Non-O visa. The key difference is that with a multi-entry visa, you can exit and re-enter Thailand to obtain a new 90-day entry stamp, and you can apply for the yearly extension from any of those 90-day entries, as long as it's done with 30 days or less remaining on your current entry.