I have a "gigabit" plan for internet. I never get a true 1024 Mbps, and 890 to 940 Mpbs is closer to reality. The biggest reason I pay the price is for the upload speed of 35 Mbps, and I get all of that plus a tiny bit more. For my business I often upload 2 and 3 GB files to our One Drive for customers to download.
I have yet to find a single web site that has the speed that matches my end. Even FTP from other sites is usually a less than 10 Mbps or slower.
The upload speed is my only reason to pay the extra price of the faster service. Most people never need that.
If you had several people at home all streaming movies from different streaming services the faster service might be useful. Otherwise it is just bragging rights. Like having a car that can go 200+ MPH. but you can't ever get close to using that speed except on a track.
I hear some video games can use a lot of internet speed. I don't play games.