It feels like more people understand how Bitcoin monetary network works, than how legacy fiat system works.

People be posting and discussing CTV vaults, utxo management, self custody, while it seems like no one has any idea on how euros or dollars being transfered.

Is it excel spreadsheet? Is it closed source database?

I believe that banks fax each other changes in some centralized ledger. But honestly, I don't care. Just an observationon how far ahead we are already!