I visit Thailand about twice a year. I try to do alternate between a Visa Run and an extension nowadays. I must say I find the current it square setup so much better than it used to be. Much quicker process, and easy shopping in the meantime makes time fly
Turns out my concerns were unwarranted. Literally got off the plane right into immigration not even an arrival card to fill out Simply showed my passport and that was it. Didn't ask for vaccine card or PCR test at all. Easiest entry I've ever done anywhere in my life.