> The problem that we're actually trying to solve with all of this is how to provide a root of trust. Blockchains are a way to do that, but I've yet to see a compelling use case beyond digital cash.

Handshake [1] provides a root of trust for DNS and DANE [2]. It's also heavily in use [3]!

[1] https://handshake.org/

[2] https://en.wikipedia.org/wiki/DNS-based_Authentication_of_Na...

[3] https://dns.live/