Not for emails that were sent before you subscribed.
(and that means new contributors get the worse experience.. not ideal)
(and that means new contributors get the worse experience.. not ideal)
(Also for example SourceForge only gives mbox files to administrators, not to regular users [0])
[0] https://sourceforge.net/p/forge/documentation/Mailing%20List...
Well, it is not perfect, much still, the hassle is one-time, so meh.
Threads can also be downloaded individually.
And the search function is decent(ish) in the web interface.