It could be possible probably, but if you prune blockchain, how would you retrieve torrent hash?
I like concept of mini-blockchain, as it has quite a few appliances, and could be scalable with a few tricks:
- like 10-20M blocks
- fast txs - I think with our consensus 15-30 sec
- maybe we ocould take mini-blockchain idea with pruning some data in the tx
- segwit

It would make 2K-4K tx/s possible, tho there are a lot of question regarding, is this sustainable, and if nodes would proceed such amount of data.

Probably not, so I think, we don't have for now 'problem'.

Btw I see that every fork of zcash and monero are just skyrocketing. I mean ok, they are privacy coins, but I dont know if someone is even thinking, what's buying into.