The big deal with WordPress, as outlined in the Think Different piece is that the strong API makes WP into something quite different from what most people think it is. I think of it as an OS for writing on the web. Very analogous to what we use(d) PCs and Macs for before networks were everywhere. This came up in a thread on Bluesky about MicroPub which appears to be a redo of Metaweblog, with better identity system.