HN user
Is public transportation really monumentally expensive when compared to almost every adult spending somewhere between $5,000 and $150,000 every 5-10 years on a car? AAA says the average American spends nearly $9k/year owning/operating a vehicle. That'd buy a lot of public transportation infrastructure.
It does not stop working when the tape is cut, only when there isn't enough visible tape. Also, you can put tape on a place outside where you are cutting and reuse it. The camera isn't pointing down where it is cutting. Also, it'll correct for fairly large deviations. It is more for one-off things as opposed to madd producing something like standard CNC router. Limitless size is nice, I am unlikely to buy a 4'x8' CNC router for my garage.
The difference is between "the technology" and an "implementation of the technology". Sure, P2P DHT exists. Just like blockchains exist. But a specific blockchain, which is append-only, is trivial to make illegal by embedding illegal content in it, making every user of it technically in possession of illegal material. You can use a DHT w/o breaking the law. You cannot store child porn on your computer without breaking the law.
Bingo.
That isn't as much of an issue. Once a secret is out, it is out. Something like child porn would be permanently illegal and permanently stored in the chain. Imagine hiding it there, letting a year or two of transactions build upon it before letting people know it was there. You can't remove it. The blockchain is now technically illegal.
I was just thinking about this a lot this week, actually. The really crazy thing is that, due to the PROTECT Act, a person in Japan could legally upload certain manga that the US would consider CP. So one wouldn't even have to risk jail to poison the blockchain.
Good luck using it to its fullest potential without their drivers.