I write code.
We can make this go easier by remembering recently sent patchsets, and suggesting that you make a follow-up v$n. We can auto-detect which patchset you're superceding by checking the date header.
This should be implemented via an API endpoint which lets you set the default email address, and a URL to the archives (optionally). Then lists.sr.ht, upon being linked to a repo, will rig it up.
REPORTED RESOLVED IMPLEMENTED
This is a golang bug.