This is like asking "vim or emacs". You'll never change anyone's mind on the matter, but you'll get the same old arguments from ~ten years ago [0] about how this is both "very simple†" and "pointless mental overhead" at the same time.
† (if you follow these rules I memorized to show off how smart I am).
† (if you follow these rules I memorized to show off how smart I am).
---
[0]: https://github.com/twbs/bootstrap/issues/3057