Name a product that is widely used as a private, shared database and isn't based on blockchains. It was possible to build these things before Bitcoin, but they

Name a product that is widely used as a private, shared database and isn't based on blockchains. It was possible to build these things before Bitcoin, but they were uncommon. Now they're common and people call them private blockchains. This same conversation will happen over and over because there are thousands of people who must believe that Bitcoin is special. It is special, just not in all the ways people claim. If the commenter doesn't hold Bitcoin, he's free to deny it. But the comment wasn't about him as an individual. It was about how blockchains make people crazy, including me.