If you prove we will not see over 10 TB HDDs in mass production in the following 6 years, then you can get some big blockers more sceptical about scaling above 2 or 4 MB. So go ahead.
You said 10-100TB, which implied a tenfold increase in 6 years. This is not likely.
All we have to do is loudly demand 100TB hard drives be available in 6 years.
Obnixious repetitive complaining will force those lazy, stubborn, greedy bastards at Seagate and Western Digital to come up with a solution.
That's how engineering works, right?

Roughly. Most solutions start with a problem, not the other way around.* If there's no demand for greater storage capacity, devices having such capacity are far less likely to be made

*Bitcoin, of course, being the notable exception.