Even just introducing emulation layers for the old parts and making the new parts opt-in would be better than just giving up and keep on going. Plugin authors can choose the new subsystem as they publish updates or new plugins and themes, and in return they get speed and security guarantees.

And since the WordPress foundation controls the extension marketplace, they can reliably determine which parts of the API surface are in use, or even invest a chunk of money every month to send AI-written patches to plugin maintainers to ease the transition.

There would be so many ways to improve the situation (to the benefit of WordPress maintainers, customers, and ecosystem vendors alike, mind you!), but alas, they are stuck to their ways and will not.

> And since the WordPress foundation controls the extension marketplace, they can reliably determine which parts of the API surface are in use, or even invest a chunk of money every month to send AI-written patches to plugin maintainers to ease the transition.

What WordPress foundation?