But can't you just download larger chunks over whatever connection you have? Or is it common for internet connects in (I assume) the US to be so bad that you can't download a 20GB or 50GB file without errors?
It’s really a question of how well it resumes: if you’re trickling in a 20GB file and get a couple lost packets at 10GB, was that earlier transfer wasted? Most people use wireless so it’s not hard to have a transient failure which will disrupt a TCP connection but won’t last that long in absolute terms.
