I see this is a positive if we don't have to go to a desk and see an actual person on arrival. Singapore and Malaysia are now so easy to go in and out of using the automated gates.
I have been using the auto gates to leave Suvarnabhumi recently though, which made things a lot easier.
However, this does also mean that long-term tourists without proper visas may be able to come in and out on ETAs as much as they like, without human intervention. They could of course electronically limit the amount of ETAs per year…