Why do ISPs still provide email?
FWIW; I've seen inside a few large ISP mail deployments, but I speak for myself in my comments here and not my employer (etc etc etc).
Why do ISPs provide email? Because a huge percentage of customers use it, and want it.
I personally don't (I have my own domain, and use Google apps), and know very few people who do, but lots and lots of customers still use it. I can't get into numbers for obvious reasons, but it's seen as being incredibly important, up to and including in the CxO layer, and a lot of money gets spent on supplying it and improving it.
Oddly enough netbooks exist, or at the other extreme you've got 64 CPUs and 256GB of RAM but only crappy 2000era Matrox graphics. Neither of those, and a pile of other cases in between (eg. desktop with Intel graphics), are going to be able to do much or anything to accelerate the graphics in a window manager so there should be a fallback that doesn't need a GPU. If the fallback is handing over to something else like fluxbox, fine, that's better than the current situation.
Eh? I bought literally the cheapest netbook I could, and its GPU is more than capable of making GNOME3 perfectly smooth.
If you want a fallback for non-GPU, there's no reason it has to be part of the GNOME stack - LXDE, XFCE, Fluxbox, etc - all perfectly reasonable fallbacks that you can select during login.
Or not host it because it's disrespectful to the guy *in* the video, and his family?
Friction is a drag.