Sure, but remember that the disk bandwidth is the _uncompressed_ data. By definition it’ll be at least 2× larger than the compressed data you downloaded, if not more. Steam downloads are commonly disk or cpu limited on 1Gbps connections.
i'll concede you're probably right. In the late 1990s i had a Promise ATA 100mbit IDE card, and i swore that someday, i would have an IDE connection to the internet. Now, my CPE is called a terminal, but it's some proprietary cable from the terminal to the router. And my upstream isn't quite 100mbit (on starlink; it's about 40-50. On at&t 4g LTE it was 30-65mbit/s upstream).
so i'm still not at IDE speeds, yet. maybe on my cellphone in the metro i get that speed, though...
It is really ridiculous how fast our connections are these days, when you stop and actually think about it. Also pretty ridiculous how slow they used to be!