> You don’t need anything but vanilla pg and a supported file system to do it anymore; just clone the database using a template and a newish version of Postgres.

Are you referring to `file_copy_method = clone` from Postgres 18? For example: https://boringsql.com/posts/instant-database-clones/

I think the key limitation is:

> The source database can't have any active connections during cloning. This is a PostgreSQL limitation, not a filesystem one.

Yeah, that's the one. My use case is largely for local development, so the active connections thing isn't a limiter for me.