Can you use the E-gates at Suvarnabhumi Airport after multiple visa exemptions?

The auto gate wouldn’t let me through so had to join the queue it also happened to many people and put the immigration under more pressure as these auto gates have taken up the areas where there would be immigration officers teething problems I hope

The e-Arrival gates aren't a free pass to get in and if your previous entry/stay history is extensive, it'll just not let you in and say go to a stamp in counter manned by a real person

Yeah I entered through them on Thursday with no issues. Can't remember how many times I've entered visa exempt this year but it's probably around 7 or 8, with a maximum stay of 8 nights I believe with the majority being just 2 or 3 nights. Travel pattern is clear and consistent and whenever I've been asked to show a flight out of Thailand I've always been able to.

Seen them refuse departures before and send people to the immigration booth , so expect inbound to be the same.

May I ask... WHY are you entering Thailand so MANY times this year and possibly in years past? As you are age 50+, it might be a good idea now to get a correct Thai Visa for your planned stays in Thailand. The Non O Visa as a retiree, even though you are not required to be retired to get it, can be the Thai Visa for you. The Non O gets you 90 day stamp on arrival and you can get a one year extension of stay at your local Thai immigration office by meeting the extension requirements. Are you Married to Thai? Are you Father of Thai child? Are you a digital nomad? The crackdown underway by Thai Immigration officers is REAL. DO YOURSELF A BIG FAVOR...get the correct Thai Visa BEFORE you try to return to Thailand. Good luck