I see what you mean, but I counter with Plone. It's been around for 24 years, and the annual Plone Conference is coming up in a couple months. Still, you don't see a whole lot of new Plone sites rolling out these days, and there's no Automattic-scale company with click-here-to-deploy convenience.

Nothing against Plone (although I was very happy to put its foundation layer, Zope, in my rear view mirror). It's a fine program that's very good at what it was. But just because something's been around a while doesn't mean that it's still vibrant and growing.