According to the agent who assisted me, getting the residential house registration (“Yellow Tabien Baan”) is very difficult. You have to apply to get it after working in Thailand for 10 years.

I used an AIS eSIM in Thailand earlier this year and it worked flawlessly. My speeds were much, much faster than what I experience in the U.S. I've used both physical SIMs and eSIMs and I now prefer the later. Any iPhone or Android phone made in the last two years or so will support two eSIMs. However, if you still prefer a physical SIM, you'll have to buy an Android phone.