WordPress has always been an absolute mess. The basic architecture was insane even in the early 2000s. There is no effective sandbox for plugins or themes, and you can't really make serious use of WordPress without those.
Nowadays, there are so many better applications that accomplish the same thing, and they aren't stuck on a half-baked database schema from 2003, they can be version-controlled, multiple people can work on them at the same time...
WordPress is one of the worst widely used pieces of software on the web. It is a catastrophe.
For more custom projects, I prefer the headless variety[1] because it makes sense to separate the data and presentation layers. That means you have the full ecosystem and flexibility of HTML/CSS/JS.
Ghost[2] was the first serious competitor I saw years ago. Gatsby is among the most popular these days[3].
But honestly, information sites should just use SquareSpace or something like it. There's no reason to maintain static site infrastructure at this point.
I mean, literally thousands of sites do make serious use of WordPress. Quite surprised that in your use of WordPress since 2006 you haven't heard about any of them.
People spin up a WordPress instance for their blog that they're totally going to use every day, install a bunch of plugins and a fancy theme, then within a few months have completely forgotten about it. Meanwhile, vulnerabilities are discovered in the plugins they installed. Maybe they're patched and maybe they're not, but either way their server doesn't get updated.
Within a few months it's hacked, and the ex-blogger probably doesn't know until they get an email from their hosting service complaining about malware being served from their blog.
This is made worse by the fact that, since WordPress is everywhere, it's worth the time for bad actors to write scripts to exploit vulnerabilities in outdated versions of popular plugins. It doesn't matter how obscure your site is, if it's written in WordPress and not up-to-date, it's as good as hacked.
Unless hosting the product is your core business model, let someone else do it, because then there will be one or more people dedicated to making sure it works perfect and is regularly updated.
They all seem to charge $90 for a year of updates. Gets steep quickly- theme, backups, layout builder etc. Fine for the first year but probably don’t get renewed and then the plug-ins don’t get updated.
I’d love to see a list of fully featured open source plug-ins.