If you use xfs (+`file_copy_method=CLONE`) you can do this with Postgres 18.
`CREATE DATABASE clankerdb TEMPLATE sourcedb STRATEGY=FILE_COPY;`.
But Ardent can be useful for many, because cloud providers uses heavily restricted Postgres. And many use Aurora, which doesn't event let configure the `log_line_prefix`.
Though if cloud providers add file_copy_method=CLONE compatible managed pg ...