WayBackMachine is slow (slower than many bloated websites). So it’s not a good enough experience for the person clicking on that link.
Secondly, I personally don’t like the fact that WayBackMachine doesn’t provide an easy way to get content removed and to stop indexing and caching content (the only way I know is to email them, with delayed responses or responses that don’t help). It’s far easier to get content de-indexed in the major search engines. I know that the team running it have some reasons to archive anything and everything (as) permanently (as possible), but it doesn’t serve everybody’s needs.
Secondly, I personally don’t like the fact that WayBackMachine doesn’t provide an easy way to get content removed and to stop indexing and caching content (the only way I know is to email them, with delayed responses or responses that don’t help). It’s far easier to get content de-indexed in the major search engines. I know that the team running it have some reasons to archive anything and everything (as) permanently (as possible), but it doesn’t serve everybody’s needs.