ISP Domain Auction

Now, if there's a sincere need to filter, say, because you still use
AGS+'s with CSC/3's and 16 MB of RAM and your poor 1988-age equipment
can't handle it, then fine...

Just make sure you contract with someone who can handle all the routes to
be your default route / transit provider.

Provider X, like many smaller ISPs, should just admit that their
equipment or expertise is inadequate to route the entire Internet and
contract with someone who can handle all routes.