The vision of course did not include centralized authorities, it's counter to the entire purpose. We already have had digital banks, crypto is not about having digital convenience. It's not the "exchange" part that wasn't envisioned, it's the "centralized" part, because that is the same thing as a bank. That's what the SEC (rightly) made their case on with Coinbase and others. Bitconnect, FTX, Coinbase... that kind of thing was not envisioned originally and is counter to the whole concept and purpose of crypto.
Also this (from bitcoin whitepaper):
"A block header with no transactions would be about 80 bytes. If we suppose blocks are generated every 10 minutes, 80 bytes * 6 * 24 * 365 = 4.2MB per year. With computer systems typically selling with 2GB of RAM as of 2008, and Moore's Law predicting current growth of 1.2GB per year, storage should not be a problem even if the block headers must be kept in memory."
I'm convinced 90% of people talking about crypto don't get it.