From what I can find Postgres 17 [1] introduced incremental backups to pg_basebackup, refined in 18, but nowhere near the full featureset of pgBackRest. Is that what you meant? Having builtin incremental replication to a S3-compatible storage would be great.

[1]: https://www.postgresql.org/docs/release/17.0/#:~:text=pg%5Fb...