I've just run into a few link-only answers again. This time I found a useful guideline to decide whether they are worth keeping or not.
Have a look here
TL;DR: Ask yourself, is the answer still useful if the link were not working?
- Yes, the answer still helps without the link: It may be short, but is an answer!
- No, the answer would be useless without the underlying link: It is very low quality and should be improved or removed.
Still, though: We'd much rather have an answer with a proper explanation and some background.