Backcompat with what? ripgrep was, is and will never be POSIX compatible: https://github.com/BurntSushi/ripgrep/blob/master/FAQ.md#can-ripgrep-replace-grep http

Backcompat with what? ripgrep was, is and will never be POSIX compatible: https://github.com/BurntSushi/ripgrep/blob/master/FAQ.md#can-ripgrep-replace-grep https://github.com/BurntSushi/ripgrep/blob/master/FAQ.md#can... Aa for ugrep, flipping the question around would be more appropriate. ugrep has caught up with ripgrep in some common cases, but not all.