[reliablereason]

That depends on how much data you are pushing. if you are pushing 200 mb on a 100mb line you will get 50% packet loss.

[spwa4]

Well, yes, that's the idea behind TCP itself, but a "normal" rate of packet loss is something along the lines of 5/100k packets dropped on any given long-haul link. Let's say a random packet passes about 8 such links, so a "normal" rate of packet loss is 0.025% or so.

[positr0n]

Once it makes it to the long haul links. Measure starting at your cell phone and packet loss is much higher than 0.025% and that's where QUIC shines.