@Steve **********
I don't think having the savings amount is what some people don't like - it is having that money basically frozen in an account and that account doesn't even pay reasonable interest. At that point it isn't really savings anymore since you aren't free to spend it.
The benefit of leaving that money trapped is that you don't have to leave the country for a couple of days a year and you can get a local bank account to pay by QR code without incurring any related fees. If you travel outside of Thailand each year then the 180 day limit isn't really limiting. So you are trapping cash in a useless account for basically the benefits of paying by qr code.
The DTV can be advantageous for those that don't need the local account.