What are the rules for multiple entries on a Thailand O-A visa?

@Tod ********

Believe me Tod, in this realm, every answer can easily lead to another question or five, and I think you know that. 😁 Okay, well "unlimited entry/exit" is more info on it than I had found, so I thank you for that. I was hoping that was the case. That was one main thing I wanted to know—whether by default it is limited to like only 3 entries a year, or means unlimited entries, or what. They don't spell out these details, which forces newbies to pick things apart and ask follow-up questions. For me it is a very important question because I'm not interested in any one-year arrangement that would lock me into staying in Thailand the whole year (again, this view presupposes a return to relative normalcy next year regarding international travel).

@James *******

Thanks. Sorry, I should have framed the question slightly differently and more specifically, like this: Assuming things "normalize" next year, will the multiple entry aspect of an OA allow me to easily fly to other countries and return to Thailand? What does the multiple entry aspect normally facilitate? I don't mean land borders, I mean I want to be able to fly to Bali, Vietnam, etc. (once those countries allow it, of course). Just trying to get an overview of the subject of multiple entries and how they work, at least during normal times.