I never really understood the argument, you can design the frontend with AI anyway and then use WordPress as the CMS for clients. Clients want to be able to log in, update CPTs, edit a calendar, post pictures, things like that. Surely the idea isn't to vibe-code an admin panel/cms from scratch for every project?
For client projects I tend to go with KirbyCMS. Easy license, great functionality, very easy to setup and configure for the client side users. And way less bloated. I actually really dig it and nearly exclusively use it for my projects.
But other tools are great as well, like ProcessWire (named above).
Depends on the client, PR agencies end up building a lot of little sites where they are also managing most of the content for the client. Wordpress was huge for this because the software cost was zero and basic WP engineers were not expensive to hire. Now they’re paying for AI licenses so they might as well use those instead.
Not to mention the amount of online stores that Wordpress and its plugins power. Vibe coding that would be insanity when solutions already exist.