Largely right, but actually a lot of that stuff is still out there. The personal and hobby pages, forums, blogs, etc.

Google just doesn't know that they exist anymore, or rather doesn't want us to know, because those sites are not commercial enough or big enough.

Almost without fail, no matter what you search for, it tries its best to turn it into a search for a product or service. And those content oriented websites don't fit that, so it just pretends they don't exist.