I do still notice upstream improvements though. Both those old 2mbit and 8mbit connections were 256kbit up, and I currently have "up to 17mbit" which is [quick check of router logs] ~11mbit ATM - that can be limiting for backups or when wanting to share video or HQ photos with a large group. So the FTTP upgrade _might_ be justifiable as more than pure luxury.
Developers should use old hardware and slow connections, they would make much better apps.
If the whole industry had been stuck on hardware and bandwidth from 10 years ago, that most likely wouldn't be a problem.
There are old people in my village complaining that the 200 Mbps connection is "horrific" because there is something wrong with their equipment/setup so it cuts out often and leads to buffering on their IPTV.
I once had a 100+ mbit comcast connection that couldn’t reliably do 2mbit in the evenings.
Or if you have Steam, and every game wants to push 10-60 GB (!) updates every few weeks - this becomes a "leave the pc on for a few nights" ordeal. With 100 mbit/s, you give it 50mbit/s and an hour and everything is updated - all while you can keep working because you still have 50 mbit/s left.
Or if you have to quickly set up a Windows VM or other VM - not only is the download the longest process of setting it up, it will also happily update forever and hog the network.
Now assume you have 2-3 devices in the network, all doing backups, downloads, auto updates, and your 10-15 mbit/s connection is gone.
Good luck doing a backup, because residential 15 mbit/s download means 1.5mbit/s upload - you cant back up anything. Or stream your desktop. Or upload images in any reasonable amount of time.