Can South Korean citizens cross into Thailand multiple times by land without visa restrictions?

You're not wrong.

FYI—

For South Korean (RoK) passports and a few other countries who have BILATERAL visa waiver/visa exemption with Thailand, the 2 free land entries limit per calendar year never applied to them and could make more than 2 land entries into Thailand per calendar year.

A specified by various Royal Gazette Notices: Malaysia, Singapore, Indonesia, Burnei;

others: Laos, Vietnam, Russia, South Korea, Hong Kong, and few others I don't recall at the moment

Sawasdee and Sabaidee Everyone!

Expats in Laos (and others) regularly go to and from Thailand for day trips for various purposes besides tourism: medical visits, stock up on groceries, bring the odd equipment for repair to specialists/experienced in Thailand, source spare parts for household items, even just enjoying a family outing, etc.

That's why the restriction of 2 free land entries per calendar year to most of the tourist unilateral visa exemption countries starting in January 2017 was really a bummer for expats in Laos and even those Lao families with members holding foreign passports.

Because, getting the 6 month Thai METV was quite inconvenient, such as competing in the queue with all those doing Thai visa runs, et al just to do day trips across the bridge/border every so often (above the twice per year limit).

Notwithstanding all I have said, expats in Laos do support Laos and the Lao economy (buying and using local goods and services), but enjoying something different just a short drive across the bridge every so often more conveniently would be nice.

That's why it is great news that, along with expanding the tourist unilateral visa exemption to 60 days and 93 countries/territories, the 2 free per calendar year land crossing limit seems to be rescinded as well, but some Thai Immigration officers at various border posts along the Lao-Thai Border still say otherwise.

It is unfortunate that there is nothing yet published in the Royal Gazette nor any publicly seen or circulated Notices or Directives from the Thai Immigration Bureau (สตม) that would say the 2 free land entries limit has been "officially" rescinded.

It looks like you are back and fore regularly but only for short periods inside Thailand. That's not the behaviour of a typical tourist so it may raise other questions as to what you are coming to Thailand for

I can confirm there is no issue to go through land entry for more than 2 times a year from Laos or neighbouring country as my spouse has done that numerous times (>5 time land entry) a year for short visits.

The immigration officer may ask if they sense you are doing a lot of border runs and staying prolong period without a long term visa.

With your entry history expect to be questioned, if not denied entry, because you follow a pattern of trying to live in Thailand long term as a tourist.

Koreans qualify for 2 entry programs without a visa. The first is "visa exempt" which used to be 30 days but is now 60 days. Koreans also qualify for "visa waiver" which is 90 days for Koreans.

Visa exempt used to be limited to 2 times per year at a land border, but as of July 15th, 2024 that limit was removed. There was never any limit to number of entries using visa waiver.

If you enter too many times, or spend too long in Thailand, without a visa, eventually the immigration officers will use their discretion to question why you are spending so much time in Thailand without a proper visa, and can warn you or possibly even deny you entry.