alt Hacker News> > - My ISP gives me a /64, what am I supposed to do with that anyways?
> What are you supposed to do with a /8? Do you have several million computers?
The /8 was for private addresses, so "free" and uncontested, while the /64 is a public resource. Looking at it as extraneous or over provided is understandable IMHO, even if mathematically it's not supposed to get depleted.
At least it's not doing anything helpful for OP.
The IPv4 10.0.0.0/8 (along with the other private ranges) runs into lots of problems when connecting two private networks (e.g. VPNs, VMs/docker, hotspotting), whereas that /64 will not conflict with anyone.