> > studied this, and my Emacs 25 build is quite old) that `A'

> > in Dired is now bound by default to a command that requires

> > a user to have an external `grep' command?  (This was not

> > the case previously.)

That's a valid point.

@Dmitry So does emacs revert to the old function if grep/find is not found on the system? What happens if the system doesn't have either of those two.

For example, on Windows, (executable-find "grep") returns nil and (exectuable-find "find") returns path to the Windows' find.exe, not GNU find.