There is no such thing as a blind relay. There will always be meta-data accumulation at such points in the network.

It is possible to try to minimize the meta-data accumulation and obfuscate it further and there are certainly some interesting theorectical concepts for that in systems like SimpleX, Nostr etc. but in the end most of these are just giving a false sense of security.

In addition many of these systems engage in what I call “trust-washing”, i.e. them proudly proclaming: “there is no need to trust us, bro!” When in reality there are multiple points of failure in their pretend to be trustless system that they just chose to ignore or try to distract you from.

And when it comes to the real-world, tried and battle tested system like Tor are where I would put my safety, not some brand new crypto-bro dondogle that is funded by venture capital investors (like SimpleX).