But true, while 100/100 Mbit is commonly an option in big cities (when I looked for an apartment in Malmö a few years ago, all the ones I looked at had 100M-1Gbit), I'm sure most people go for the cheaper 100/10 option, since most people aren't uploading anything. One friend has 250/50, which seems like a good compromise.
Also I noticed there are very rare use cases when I'm able to actually get over ~30Mbit or so downstream, usually the servers I'm downloading from aren't capable of delivering data so fast.
That said, I ran a internet radio station + free image host node on my residential connection and was pushing a few TB/mo up and never got any complaints. And BitTorrent is obviously quite popular in Sweden so I'm sure there's a bunch of seeding going on.