The mailing lists and maybe even where you were old links if organized redirect, I think it would have been convenient. Example https://lists.freebsd.org/pipermail/freebsd-arch/2014-August/015726.html contain link https://phabric.freebsd.org/D527 this broken now, actual link https://reviews.freebsd.org/D527
Moving that to the people who can do such things, they can decide wether they do it, or not.