+ davfs2 needs Range: request support for this to be feasible:
+ https://savannah.nongnu.org/bugs/?33259
+ https://savannah.nongnu.org/support/?107649
+
+* Contribute something like IMAP IDLE for "git fetch".
+ Inboxes (and any git repos) can be kept up-to-date without
+ relying on polling.
+
+* Improve bundle support in git to make it cheaper to host/clone
+ with dumb HTTP(S) servers.
+
+* Expose targeted reindexing of individual messages.
+ Sometimes an indexing bug only affects a handful of messages,
+ so it's not worth the trouble of doing a full reindex.
+
+* code repository integration (cgit: done, TODO: gitweb, etc...)
+
+* migration path to v2 without breaking v1 "git fetch" cronjobs
+
+* imperfect scraper importers for obfuscated list archives
+ (e.g. obfuscated Mailman stuff, Google Groups, etc...)
+
+* improve performance and avoid head-of-line blocking on slow storage
+ (done for most git blob retrievals, Xapian needs work)
+
+* HTTP(S) search API (likely JMAP, but GraphQL could be an option)
+ It should support git-specific prefixes (dfpre:, dfpost:, dfn:, etc)
+ as extensions. If JMAP, it should have HTTP(S) analogues to
+ various IMAP extensions.
+
+* search across multiple inboxes, or admin-definable groups of inboxes
+
+ This will require a new detached Xapian index that can be used in
+ parallel with existing per-inbox indices. Using ->add_database
+ with hundreds of shards is unusable in current Xapian as of
+ August 2020 (acknowledged by Xapian upstream).
+
+* scalability to tens/hundreds of thousands of inboxes
+
+ - pagination for WwwListing
+
+ - inotify-based manifest.js.gz updates
+
+ ...
+
+* lei - see %CMD in lib/PublicInbox/LEI.pm