I suspect your perspective is based on your personal exposure. India has a lot of people. As such, they have a lot of content producers. Some of which will naturally be "a few years behind". There is still a significant amount of modern and "cutting edge" content being produced from India.

Possibly that you heavily index on the latest and greatest hype, and are not tapped into that info stream from India? Also possible that culturally they focus on providing business value, which is often by using tried and true technologies?

It’s not like they’re talking about PHP becoming object oriented here…

The article in the OP talks about logical replication in PostgreSQL 15, how is this outdated?