While you're probably being facetious, the market demanded 4gb cards.
Indeed, because in current times 4gb is necessary and not just there as a selling point.
How Nvidia ever thought they'd get away with it with 4k around is beyond words. Maybe in their world they expected people to buy Titans for 4k?
If I had bought a single 970 I wouldn't really care. First up, one is not enough for 4k so you'd be a bit silly even trying it. But two does sound more than enough for 4k, yet 3.5gb isn't enough.
I said at launch it was a very strange release. It offered nothing but VRAM over the 780 and 780ti.
If I had one and played up to 1440p I wouldn't care if I'm honest. At the end of the day they're more than enough for those resolutions. Yeah sure you may have to turn the settings down a bit but at £280 or so they're not exactly terribly expensive are they? My 7970 cost me £439 at launch and that was the absolute cheapest I saw them for. Some were £500 or more.
It's a mid ranged card that people are expecting ultra high end out of.