Toby Will what you are saying is correct. The wording says "any visa valid less than 12 months". Here's an idea, renew your 1 year extension of stay a month early and then you have 1 month to renew your licence and get 5 years. I'll be doing it like that.
this is so coincidental, I did mine last Friday too. I was updating my address at Bangkok Bank and I asked the lady to check all of my account and she mentioned I should go to dtac and do it. I had a new passport too but I did do the 100 baht deposit and the slip with my name, passport and number was printed out. For K Bank they only needed the digital certification with qr code. It took me 5 hours total to do 2 banks and do dtac. So glad it's done now.
When you are applying for the Non O evisa they will have several options. Click other and then click over 50 pensioner. They won't ask for an invitation letter there. They do ask for proof of 800k (or equivalent) in your home country bank though. That's how i did mine and it went through, good luck.
never got asked for a yellow book for either Bangkok Bank or Kasikorn, never had one. Residence certificate from immigration was all that was required using the apartments tm30 card.
Bangkok Bank did it 2 years ago for me. Then I wanted to do the same at Kasikorn and I was promptly told "foreigners have to wait 6 months". 2 year later I got the message on the app to come in.
i have held my Kasikorn Account for 13 years now and I have never been asked to do any of that. I was however asked to complete facial recognition in any branch so I did it last week and I also received a new bank book as the old one was full. Even then wasn't asked for anything extra.