Why would they? Postgres is free and does an amazing job.

I wish they'd adopt, merge in, or give official blessings to versioned postgres extensions like citus and pgvector.

Also Postgres has enjoyed decades of debugging.

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.