My attempt to define "strict global consensus":

- A strictly ordered and objective list of transactions,
- that everyone on the network agrees to exactly,
- in near real time

If some element of an application necessarily requires these, use blockchains; for everything else there are much better solutions

blockchains are not for storage of data

they are for the storage of hashes and proofs of data

strict global consensus on when things happened and in what order

storage should be just simple torrent-like p2p