Also in general, assuming that capacity increases of the past decades can be extrapolated into the future without any decrease in the growth rate is science fiction. There are physical limits in miniaturization. We are already very close to these limits.
25 years ago when circuit feature size was 1 micron - we were saying the exact same thing. I really don't know how anyone is doing 14um. That seems totally impossible. But - whatever, they are doing it.
I don't think memory capacity will continue to go down like the chart for the last 20 years. It will go down however. Now, memory is so fucking cheap it is shocking. I once paid $100 / Megabyte (RAM). Now when I buy 128GB flash for $30 I laugh my head off.
As for bandwidth - the arguments here are hard to accept. Some large portion of the Internet bandwidth is streaming porn. I am pretty sure the purpose of Bitcoin exceeds the purpose of watching another very large black man vigorously pound some poor teenage pussy into oblivion. We already have very significant bandwidth availability. Maybe some of it needs to be
redirected - and it will as soon as the 'importance' of bitcoin transactions exceeds the 'importance' of having a look at sex sites.