For me personally this change makes sense: a router has multiple interfaces, the Source IP is selected in different ways, and especially for RPKI servers outside the network (public ones), this could even break connectivity. Vendors like Juniper had this issue and eventually added the option, which means probably VyOS will benefit too, especially since "it's just setting a value in FRR's config"™ (famous last words ;).

@Loremo I think this contribution would be valuable. Have you made any progress with your PR?