To be honest I would love for someone to work on the structuring of pg_dump for example, which is entirely driven by regexes and binary structures. It’s awful and absolutely not programmable - a real shame.
I wish they'd adopt, merge in, or give official blessings to versioned postgres extensions like citus and pgvector.
why ? Just install the extension and use it
Lack of the extension in the core means that a lot of vendors with managed postgres don't support it or ship very old versions.
I don't know, but there are tons of "rust rewrite" of everything.