This is an incredibly useful thread that contains a lot of concrete recommendations for how to do library transitions smoothly. Could someone who has a moment collect this information into some how-to documentation and submit it as a bug against developers-reference so that we don't lose it?
(We can then also grab some of it for Policy where appropriate, but I think most of it is more of a Developer's Reference thing.) -- Russ Allbery (r...@debian.org) <https://www.eyrie.org/~eagle/>