Hendrik Alma Most stuff anymore is contradictory. Wasn't always like that. Yes one person says, no another. I heard somewhere this or in my opinion. It's crap. Google is derived from people. There's maps, recommendations, pictures and star ratings. This is a great site a lot if information as long as it's coming from a Tod Danials and Lloyd Turner type. Most everything else is bs from people who think they know.
Just play it safe and bring the cash. Ignore all the "maybe" or "if you" comments. I'm on a retirement extension of stay so not a target but still brining the 20k baht when I return next month.
if you say rarely enforced you have not been keeping up to date of late. Not good to be throwing a false sense of security to people. It's the law so you should advocate bringing the 20k cash vice taking the chance.