To save you a click, the actual headline is "Help us test the SQLite implementation", and the news is that WordPress developers are asking (urging!) hosts, plugin authors, and theme developers to test the implementation and report bugs.

The most interesting bit for me: "The SQLite code used has been in use for many years and has been battle-tested. We opted to start with a tried solution instead of starting from scratch because many of the problems we would have encountered have already been addressed and solved in the pre-existing implementation."

They basically took this implementation and just adapted it to coding standards:

https://github.com/aaemnnosttv/wp-sqlite-db

This has been around since some time and is itself a fork of a previous work.

The interesting part is that this drop-in replacement (mostly) already works well, there are a few issues that are related to some quirks in the WordPress core itself, for example: https://github.com/aaemnnosttv/wp-sqlite-db/issues/18

And maybe now they will be fixed.