Does your CI really require extremely high bandwidth? Doesn't caching resolve this?

Checking out repositories is a rare event. It's even rarer to check out repositories weighing tens of gigabytes, such that throughput in excess of 100Mbps is noticeable.

As I said in my reply to CaptainZapp, it's generally fine if a background process like a backup takes several hours, and that's just for the few people who need to backup tens of gigabytes of data to the Internet every day. For everyone else, 100Mbps is far more than enough.

For most home users in particular, capacity beyond 40Mbps rarely brings any benefit.