Honestly, I'm not sure. I've seen frequent contributors in the groups say that it is never required for long stay visas such as someone on a Non-B, but I've also seen other frequent contributors say that it is required of everyone but just almost never asked for for long stay visas.
I agree that the odds of being asked are essentially non-existent if you don't have some factor about your previous stay or entry history that makes the immigration officer ask. This isn't meant to be fear-mongering and I frequently comment on posts from genuine tourists that they don't have to worry about it... but I also note that the rule does technically exist so it's up to them to decide what to do. Some people like to do things by the book and follow all rules even if the odds are approaching 100% that they won't get asked, as long as they are a genuine tourist. This post was for people who insist the rule doesn't exist, not about how likely it is that someone will be asked for it. Some people don't like to take the chance, just like odds are very slim you would get picked for secondary inspection at the airport randomly or that you will need to claim on travel insurance you purchased, but it is always a possibility.
I didn't have a chance to comment on that post before the OP shut it down after tons of posts. The issue was that the guy remained unconvinced and since I already had this info saved from before, I thought it would be good to share it so he would see it. I guess I'm standing up for some group members that I greatly respect from their frequent contributions and helpfulness to the community, that I saw him insult so unfairly.
I compiled it previously in response to a specific person that kept insulting me when I tried to convince him the rule existed, so I just had to copy and paste most of it this time. It has proven to be a useful reference to shut up the non-believers.
unfortunately for some people, the only way to convince them of the reality of something is to overload them with evidence, since clearly the succinct statements of even top contributors in this group aren't enough to convince them. Those people will argue and insult members to no end because no one bothered to take the half hour I did to search for and gather this info, specifically in response to someone in the past that argued with members for over 50 posts refusing to concede until the proof that I provided. It was not a pleasurable exercise to do this work but a necessary one given how many people insist this rule doesn't exist (as rarely enforced as it is).
but we've had multiple posts over time in the Thai travel groups from people who were able to show the 20k and were finally let in. Yes, they all got hassled and questioned, but without the 20k, they would have been denied.
I agree, there is a lot of confusion as some consulate websites also list 10k rather than 20k, but the real world posts from people who have been asked on their visa exempt entries has proven than 20k is what is asked for. (10k for paid VOA entries, which people also confuse with visa exempt entry).
You are looking at Covid era restrictions that are a distant memory and long gone. People should check their local Thai embassy website instead of outdated internet articles from the Covid era. The problem with the Internet is you can't tell if what you are reading is long outdated or not, so always check official sources. But to answer you, there is no more Thailand Pass, insurance, vaccination or Covid test requirements or anything else related to Covid, and hasn't been for a very long time already.