Really? I finally managed to get my Horizons Key for Steam.
So, the original ED1.0 was around 6Gb and now the update from ED1.4 to ED1.5 is 8.1 Gb on Steam.
And then to installation of ED 2.0 Horizons is an additional 6Gb after that.
Isn't that a little much for a game?
I feel like I'm downloading the same content multiple times!
That's because you probably ARE downloading the same content multiple times.
There are 3 version of ED now.
Elite Dangerous (32-bit)
Elite Dangerous (64-bit)
Elite Dangerous: Horizons (64-bit)
I'm guessing Steam is simply downloading all of them.