Internet is sort of naturally capped and throttled for almost all residential users. You already can't easily download something at 500 mbit, servers do not sta

Internet is sort of naturally capped and throttled for almost all residential users. You already can't easily download something at 500 mbit, servers do not stay underutilized and may not have enough bandwidth for your speed, and servers from more than a couple of hops away won't even be able to serve you at that speed over a single tcp connection, so you have to look at things like torrents. Then home routers, they suck too and might struggle with this speed, wifi most definitely is out of question. You also need to store all that data somewhere and at that speed you will run out of storage pretty quickly. ISPs are aware of all this and can bravely offer you speeds you will not be able to use beyond speed testing. They even expect new customers to go crazy with downloads in first months of broadband usage and eventually drop their usage to normal levels. Keep in mind, something like 10 mbit 24/7 usually costs them very little to even care and I think these days 50 mbits is at that level too, they are unlikely to mind if 1 out of 1000 users uses 50 mbits 24/7.