As I said, I hoped I could think of some use for these hash machines. Same for the blockchain tech itself, i.e. some usage that would not be completely replaceable by some less compute-intensive tech.

I honestly hope those usages exist. I really do. But now I don't think they do.

But, frankly, even for Internet itself everybody could see the benefit quite early.

Anyway, if you do find interesting uses that are not replaceable by simpler things, you would save a lot of garbage!! And thus would do a favor to the environment.

So yeah I hope I'm wrong.