No, announced last week and confirmed today, the test & go scheme will be suspended after 15 Jan. After that, you can still fly to BKK, but you’ll have to complete hotel quarantine before moving on to anywhere else in the country (apologies, I assumed you were hoping to avoid quarantine). Good luck.
Sorry, but your first assumption is incorrect … you will not be flying into BKK any time after 15 Jan unless you don’t mind completing hotel quarantine before exploring further. (edited)
Can I fly directly to Chiang Mai now and self quarantine in a hotel/resort? If you have any links with further information, I would very much appreciate. Thanks