This is also due to the size of traffic these days.

Originaly (if we say, take early html as a starting point) it was mostly text, then later a few images.

These days a simple webpage needs large amounts of code and data just to load.

But the infrastructure and ways of communication is really hard to take down and except for the few nations that have complete control over their own network, it is nearly impossible to break down communication completely.

As others have stated fewer isp’s and core infrastructure providers do make the global network a bit more vulnerable today. And sites and services that lots of people consider “the internet” can be (at least for a while) taken down/offline.