Not True
Just because many people chose the "convenience" of Facebook, Instagram, blogger.com etc does NOT mean the general idea of "many servers, lots of users" has died.
With a tiny bit of IT expertise (your local Linux user group can help), you can now run a WWW server on your $30 RPI at a electricity cost of a few cents per day. Behind the DSL modem. Free DynDNS is readily there.
You can do other nice things with this server, such as running your own chat server. No need for WhatsApp and their censorship. No need to suffer the arbitrary FB "algorithm" (which is in fact censorship under a new name).
The WWW of Berners-Lee is alive and kicking. It is just some power mongers who want to control information in an effort to further their pet agenda.
SMTP is also very much alive, with all the anti spam stuff bolted on. If you want to make it secure, the German government gives you GNUpg free of charge for the purpose.
Hundreds of gaming systems run nicely on top of TCP/IP.
Millions of people meet via a plethora of teleconference systems. Including open source systems you can run on your own server for privacy and security reasons.
Millions of businesses run their own distributed IT systems, either at Amazon, Microsoft, Hetzner, HPE or in their own data centre. No need to connect them to Zuckerbergs empire.
I use the qwant search engine, because I do not like Google. Works nicely for me. Others use yandex and Baidu.
Openstreetmap.org is a marvellous project from England, and apparently runs on a shoestring budget. No need for Google Maps and their data gathering.
My private RPI server can also run an SSH file server, so that my ideas are not socialized.
In other words, the internet does just fine.