Thai Visa Advice group told me I can't go from an OA to an O without putting 800k in a Thai Bank Account. They got that wrong too! 😂. I get my advice from the immigration office I'm dealing with. I find generally they have a better idea than a Facebook group!
That's going to be a waiting game. It might operate like the OX visa, where you're only stamped in up until the expiry date of the actual visa. Chances are the MFA haven't even thought about this yet. See what happens in five years, there may be another 4-5 changes of government before then 😆