What are the recent changes to the Non-O E-Visa for foreigners over 50 in Thailand?

FYI, even if you are on a single entry visa, you may still be able to get a multi entry permit to sit on top of it, once you’re in the country, from the immigration office, or at the airport if leaving from Bangkok (but you do need to allow up to a couple of hours extra to get out, don’t book a first flight of the day). I was here earlier this year on a three month single entry work visa and had to leave temporarily before coming back to complete the formalities to extend. A re-entry permit was granted no problems for a small (receipted) fee.

The non o single entry is for those who don’t want to stay longer than 90 days so not sure why you think it’s ambiguous.Its the first step to a longer stay

This is the new description for the O-A.

I do agree that the old wording was a little confusing, but this is honestly MORE confusing. They're great at this stuff...