BitTorrent, Tor, Bitcoin, and the other cryptocurrencies are the results of "the P2P craze of the early 2000s". They resulted in Wikileaks, Snowden, and Trump, not to mention the current blockchain feeding frenzy. Freenet is, by comparison, somewhat less important.
I'm puzzled by your comment because in the second paragraph you provide the answer to the question your third paragraph is about. If people are paying their ISPs for bandwidth in things like dollars, what's the problem? It's true that bandwidth is more expensive when you buy it retail from ISPs rather than wholesale in data centers, but only by a factor of two or three, so this is only an issue for the most bandwidth-intensive applications, such as Netflix streaming.
Bandwidth and computation are extremely cheap now, so I don't think this is really an issue. As a point of comparison, when I started browsing the web in a graphical web browser in 1993, I was running it on a ≈100-MIPS RS/6000 with a couple of dozen other people. There were nearly a thousand web servers (in the world, not on the RS/6000), but each one could only serve about one or two hits per second, mostly on machines similar to that one. Shortly after that, my university, with a few thousand students, upgraded its shared connection to 45 megabits per second, as part of a contract to manage a supercomputer center in another state.
My cellphone runs about 10,000 MIPS, and would have no trouble handling 5000 hits per second; this is more than the entire WWW at the time and well into 1994. Most homes in rich countries have more individual bandwidth than I was sharing with hundreds of other active users at the time.
We don't have a shortage of bandwidth or computation. We have a shortage of community, a shortage of innovation, a shortage of cooperation, a shortage of imagination, and a shortage of freedom. But bandwidth and computation are abundant in a way that was unimaginable in the days when we built the WWW.