Nah, all the old services are still out there and still work. You can still use irc, you can still set up your own mail and web server. There are even new alternatives, from tor to other hidden/dark/free...nets.

But people are too lazy, and find the "just use the largest corporate platform" very convenient, especially if it's "free".

edit: ...which is a problems, since also your viewers only use that "one big" platform, and don't check elsewhere.