Sorry, I don't mean to play the devil's advocate, this has already gone way off-topic so take what I say with a pinch of salt.
But technically, the IP is not strictly necessary? I can imagine a feasable future where it could be replaced with an anonymised IP from a larger pool generated by your ISP, with TLS for the payload. This could be solved at the internet infrastructure layer, and not required by to be solved by website developers.
But technically, the IP is not strictly necessary? I can imagine a feasable future where it could be replaced with an anonymised IP from a larger pool generated by your ISP, with TLS for the payload. This could be solved at the internet infrastructure layer, and not required by to be solved by website developers.