Slightly off-topic, but I was rather hoping for something on the distributed training of neural networks via the blockchain: make the "work" in "proof-of-work" involve backpropagation. Like SETI@home [1] but for training neural networks.

Here's a StackExchange question about this:

https://cs.stackexchange.com/questions/86364/distributing-ne...

Which links to this startup:

https://www.deepbrainchain.org/

A quick skim of their white paper [2] leaves me skeptical.

[1] https://setiathome.berkeley.edu/

[2] https://dlc0uvc36o5o6.cloudfront.net/assets/whitepapers/Deep...