True, but if you visit a site like http://sia.tech/ , in my opinion it gives the impression of a product ready to use today. Though if you look at their roadmap https://trello.com/b/Io1dDyuI/sia-public-roadmap , you get another (more realistic) picture.

Blockchain has had eight years to come up with a use case that isn't a cryptocurrency. (And cryptocurrency has had eight years to come up with a use case that isn't illicit goods.) At this point, it's entirely reasonable to ask where the beef is.