I have gigabit up and down, and wired gigabit throughout out our house. The only time I come close to saturating it is when I’m “downloading Linux distros” via bit torrent. Netflix maxes out at I believe 10-15Mbps per stream, my son has both his XBox and PS4 on a wired connection in his room, we have a combination of Roku TVs and Apple TVs through out the house.
Even when I’m working from home and uploading large files to S3, it barely hits 100Mbps on a good day and the CLI automatically uses multiple streams to upload.
My VPN connection to our AWS network also rarely hits 100Mbps.