is that worth however many percent of the worlds energy usage?

There’s no PoW Haskell chains I’m aware of, they’re POS chains which are far more energy efficient- therefore they reduce energy usage as people move over to them.

Author does not mention energy usage at all. Main problem is that he thinks that crypto is a scam where a lot of people are being tricked. Would you like your language development to be funded by drug cartels or from blood diamonds profits?

i agree crypto is a scam, and it's also a scam that's a giant waste of a huge chunk of the global generated electricity.

It's hard to tell. Haskell could make a big impact on the technology of the future. Or not.