One of the most valuable features is its ability to download a single file over multiple connections
pget -n 4 your.file.tar.gz
because many ISPs limit speed per flow and opening multiple of them, even to the same target, allows you to max out your connection.It's Windows that does nothing out of the box, so people has to go after tools.
My little brother once heard Jack and Diane on the radio, and proudly proclaimed that John Cougar Mellencamp has copied Jessica Simpson's "I Think I'm in Love with You." That also was funny.
I don't think anyone has said that Linux didn't do this in the 90s too, e.g. KDE supports this since KDE2, released in the year 2000: https://en.wikipedia.org/wiki/K_Desktop_Environment_2
In pretty much its current transparent form, though more protocols have been added since.
Not sure what CDE supported, which I think was the big pre-Gnome/KDE UI.