there are many reasons not to choose it, but then you can't live in Thailand. It's one or the other. It is very well known that you cannot bounce forever.
It's a law from 5 decades ago. An immigrations officer thinking he can still use it today has a bigger problem at the end of his (then last) working they than you. Can you imagine the headlines if one person got refused for having money in the bank?
It actually happened a year or so ago. They Thais started an investigation about what actually happened. It was clearly toned towards the immigrations officer's decisions being under scrutiny, not the fact that someone held money in the bank. The investigation concluded by the way the the claims were false and that the person in question was not refused entry, i.e. also not for having money in the bank. She was just a sensation seeking YouTuber. The statement dismissed the requirement as "secondary". But in the end, the headlines and media outrage that I imagined also before the incident, it was actually there ;)
maybe you misunderstood. Leaving Cambodia there is nothing Cambodian immigrations could possibly harass you with. If you had problems, it should have been with Thai immigrations.