Comment by pjc50
Paradoxically, the problem with an "alternative net" (which could be tunneled over the regular one) is keeping it alternative. It has to be kept small and un-influential in order to stay under the radar. If you end up with an "alternative" which is used by journalists and politicians, you've just reinvented the mainstream, and you're no longer safe from being hit by a policy response.
Think private trackers. The opposite of 4chan, which is an "alternative" that got too influential in setting the tone of the rest of the internet.
Not necessarily, Yggdrasil flies under the radar because it's inherently hard to block.
Tor even more so, the power of Tor is that the more people use it: the stronger it becomes to centralised adversaries.
The main issue with Tor is the performance of it though.