But if you need 1eb, waiting a whole month for it isn't great. You'd be better off with 720 1pb devices taking an hour in parallel.
In long term archival use cases this is less of an issue. Especially if it’s many exabytes we’re talking about, needing to be stored for decades.
But I 100% agree with your main point about possibility vs productionisation.
Yes it causes problems in this increasingly narrow situation.
Massive storage that takes a month to fully read is acceptable in a wide variety of use cases. If it's cheaper than hard drives it'll get a huge amount of users.