[ddlutz]

I'm surprised "in-home router-level network caching" hasn't become a thing, really. Lets say you have a family of 4, all with iphones that need updating, windows updates, downloading same games from steam, app store, etc. It could be significantly sped up for whole house to download file 1 time instead of 4.

[hsbauauvhabzb]

I believe Microsoft use BitTorrent to distribute updates. It took me a while to realise that many Linux distros use unencrypted http to enable caching, using signature checks to verify file integrity