question: we are using kysely.dev as postgresql query builder and porsager's postgres.js for high performance.. is this something that can complement our stack or something to replace it entirely?
You could use both side-by-side if you prefer query builders for certain tasks, but that means you'll be bundling two Postgres drivers in your application server, which could mean hitting the connection limit of your Postgres instance. Although, pg-nano has a way to limit number of parallel connections at the cost of reduced throughput.