I know a lot of people dislike PHP and WordPress, but I haven't found _anything_ that comes close to it in terms of sheer extensibility and plugin ecosystem. There's a plugin for pretty much anything you might want to do with a platform. I even moved my personal Jekyll-powered blog to WordPress a few years ago. My favorite thing about WordPress is that it's a known quantity. There's an easy to follow tutorial teachin…
There‘s like a guaranteed influx of new clients downstream, who start small with a site builder, and get snatched up as clients as they grow.
Other “competing“ solutions just don‘t support a similar continuum in their ecosystems. Either they‘re missing the “normal people DIY level“, like most JS and Jamstack solutions, and/or they miss the lower levels and have proprietary hosting and devops solutions.
Having this continuum or diverse market also means that the‘re many people depending on that ecosystem, trying to increase the influx of new people. Not only to the level they operate on, but also the top non dev level. Normal people who ask experts (devs) for advice get directed towards WP as a result.
It‘s basically self promotional.