Git-like functionality on top of existing RDBMS solutions would significantly reduce the overhead of managing ephemeral test environments for us. It would be awesome to see Dolt as a thin layer on top of MSSQL or Postgres that would allow my team to easily test changes before deploying to prod.
Today, this means creating a snapshot of the DB, creating a new DB instance, copying the data over, doing a deploy, testing changes, teardown and cleanup. Branching with copy-on-write (very similar to what neon.tech offers) on top of on-prem instances would be lifechanging for teams operating in legacy dbs.