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here is mine
blockchain is not an end product. its just an engine
btc is a car that uses an engine. and runs on a open road network
hyperledger is a cross-state lines train that uses an engine. and runs on a corporate rail network
My issue is I think that the "blockchain" is an end product only designed to facilitate a specific need.
That need is what Bitcoin wanted to originally do and currently does, which is many different things.
Currently, people are attempting to place "blockchain" into things that don't have any need.
This has led to the expansion of the definition of "blockchain", IMO.
Ultimately, I don't think there is any purpose to use "blockchain" outside of unregulatable things.
If you can not or should not trust others, than the "blockchain" is important.
I think the "blockchain" must be immutable, otherwise there is no point.
Under some current definitions of "blockchain", it does not need to be immutable either.
So then, what is the blockchain and why did Satoshi "invent" it?