What happens when tomorrows 12TB is how we look at 12GB today?
All of what you say heavily depends on the rate of adoptions and if it remains a niche doesnt it?
Consumer tech is not static and technological development is not static either.
i.e. implementing bulletproofs shrunk Monero transaction size by ~80%
You're basically saying Monero will suddenly become so successful that it will break (a problem that is also possible for Bitcoin and more likely for it's popularity). What a great problem to have. And if it doesn't gain that crazy level of success (most likely case) then what is the problem? It still remains a useful tool for many.

