Hi Andreas,
I think the current archival system, while not as manageable as Gossmer-Threads, is fine. We've had enough issues with privacy concerns on this public list, and I'd rather keep this list public yet still maintain what little bit of safety and privacy we can.
If the members of this list think that an additional archival system is welcome, so be it, but, I think at this time the current system is fine.
-Sarah