Comment by Avamander

Most software and CDNs also don't utilise fast connections properly. It's kind-of a chicken and egg situation where hardware doesn't improve because customers don't demand it because software and services can't handle it (and you can start from the beginning).

It is very slowly improving, but by far the fastest widely used services I've seen are a few gacha games and Steam both downloading their updates. Which is rather sad.

Windows Update is slow, macOS update is abysmally slow, both iOS and Android stores also bottleneck somewhere. Most cloud storage services are just as bad. Most of these can't even utilise half a gigabit efficiently.