Mostly true but not quite.

You can't do email the "old way" because you'll be buried in spam, and even if you can handle that, others who don't do it the old way may never get your mail.

You can't put a server on the internet the old way because there is nonstop automated door knocking for security violations. In the old days, the attacks were much less sophisticated and mostly a "gentleman's agreement" meant they didn't happen at all.

You can't just open a port and expose a service if you're on CG-NAT or if your provider prohibits or blocks it otherwise.

You can't really do instant messaging the old ways (remember pidgin?) because 99% of the people you'd want to message are on systems with no external API to connect to.

Aside from that yes. I still have an old school static IPv4 address that serves an old school, mostly static HTML web site (and behind authentication some other useful stuff to immediate family members). Uh oh, did I just invite more door knocking?

I'm still running multiple email systems the "old way". Been doing it for 30 years and don't intend to stop now, both at work and at home.

There are a few extra hoops these days to jump through ... but still it moves.