Comment It's not a blockchain (Score 1) 219
Blocks of transactions are not packaged periodically and linked together to ensure immutability. Instead, transactions are stored in a distributed database which uses 'versions' to provide a transaction history. Data can be stored as 'resources' (data) or 'modules' (code). Interestingly, the tech paper states modules are immutable but is silent on resources. Maybe a closer read is necessary.
There is no mining in Libra and there are no blocks. Instead, transactions are 'validated' by 'validators'. From what I can gather, validators are trusted parties. It looks like, initially at least, validators are owned by the parties to the Libra Foundation. They are trusted parties. They want to move to Proof of Stake in 5 years. They also want to move to permissionless (anyone can 'validate') in 5 years. We'll see...
Most users' entry point will be via Facebook's Calibra wallet which will attach to Messenger and Whatsapp and whatnot. There goes privacy.
So, it's a trusted, distributed ledger with no privacy. What's not to like?