Remember just 32 megabytes is going to run you about $50. So it's only going to be used for notary/archival type stuff. Money txns are cheap because they're very tiny.
Hmmm. If we for example put all YouTube videos on the blockchain, it's clearly going to be enormous. I don't think it's practical to have 10000s of identical copies in that case.
If blockchain works exactly as now, yes. But what if it was only partially duplicated, with perhaps 1000 full copies in total rather than one for each node (perhaps millions)?