I've also seen questions on unix.stackexchange like [1][2] that BSD grep has been buggy for some common usecases [1] https://unix.stackexchange.com/questions/3

I've also seen questions on unix.stackexchange like [1][2] that BSD grep has been buggy for some common usecases [1] https://unix.stackexchange.com/questions/398223/grep-strange-behaviour-with-single-letter-words https://unix.stackexchange.com/questions/398223/grep-strange... [2] https://unix.stackexchange.com/questions/352977/why-does-this-bsd-grep-result-differ-from-gnu-grep https://unix.stackexchange.com/questions/352977/why-does-thi...