Ok, so around 20 years ago we were fine with 56k, what do you think we need in another 20 years? Unless you wanna put down new lines every handful of years this is actually a good investment into the future.
Asked another way: are there any current fringe use cases for residential users to make use of this kind of bandwidth?
*edit: ugh. Sorry, replied to the wrong comment.
- cloud storage, sharing and backup - at 40Mbit a remote site feels like a slow thumb drive where copying a 1GB folder of an image or video project to the cloud takes 5 minutes, at 1Gbit it feels like a modern hard drive where that folder takes 10 seconds and doesn't interrupt your workflow
- high res video streaming (3-4 people in your household streaming at 4K will overload your downlink at 100Mbit)
- high res video conferencing (3-4 people in your household being in zoom calls at the same time will likely overload your uplink at 40Mbit)