Kind of. For horizontally scaling writes we are building the Vitess for Postgres which we are calling Neki https://www.neki.dev/

The product we are GA'ing today has the option of PlanetScale Metal which is extremely fast and scales write QPS further than any of the other single-primary Postgres hosts.

Thanks for the response, this clarifies things for me because I thought this was already a vitess for postgress implementation. Awesome to hear that this is coming.