blockchain refers to a system in which a record of transactions made in bitcoin or another cryptocurrency are maintained across several computers that are linked in a peer-to-peer network.

Yes that's perfect definition in the context of digital assets but as of now blockhain is much more than a crypo technology.

limitation in the performance of 1 node cannot influence the performance of the others within the whole peer to peer system.

Yeah the Byzanthine fault tolerance of the blockchain adds to the versatality besides security and transparency.

You have written a good quality and comprehensive post .

Good luck