Wasting: its required to generate SHA256 hashes, which is just math. The math is intense, but it was the best on offer in 2008. Useless: it provides Bitcoin’s BFT. Until it existed there was nothing better. TL;DR: hindsight is 20/20 https://twitter.com/peaheart/status/1000994268800954368 …
This seems less than satisfied with the current model. Assuming some magical circumstances where we don't paradox or break things, what would you have different? A more useful or less energy wasteful algo?