PostgreSQL 19 Beta 4 takes four announced features back out
PostgreSQL 19 Beta 4 is out, and the notable part is what left rather than what arrived. Four features that had been in the tree for this cycle were reverted: SQL/PGQ property graph query support, online enabling and disabling of data checksums, temporal updates and deletes through the FOR PORTION OF clause, and ALTER TABLE ... MERGE PARTITIONS together with ALTER TABLE ... SPLIT PARTITIONS.
The project states the reasoning directly: reliability first, and a predictable release schedule second. Work that is not ready to meet both gets moved to a later major version rather than shipped on time in a weaker state. The release candidate is planned for early October, and general availability may follow in the same month.

What it means
If you were planning around any of those four, the plan moves by a full major version, not by a point release. That is worth knowing now rather than in October.
The wider signal is about how the project handles a deadline. A feature removed during beta is a feature that reviewers were still arguing about, and shipping it would have meant shipping the argument too. Reverting is the expensive option for everyone who wrote the code, which is exactly why it carries information: it says the schedule is real and the bar is not negotiable per release.