I wouldn't argue that the vim default (of not allowing backspace beyond where you entered insert mode) is ergonomic, but I do prefer and exclusively use the default vim behavior. It's just what I'm used to at this point (24 years using vim/nvim) and if I set it the "ergonomic" way, it's disorienting.

So, ergonomic or not, some people do prefer the default -- at least one person :).