Because it's NOT. Toms and other tech sites ran tests and concluded one has to
REALLY WORK at it to make that issue appear. Like I said...a largely overblown issue. Below is a link to one of the conclusions:
"The question is, is Nvidia doing something wrong by selling a GPU with a 3.5GB frame buffer out of 4GB usable (as the term “usable” is commonly understood)? For the vast majority of users and scenarios, no — what matters is useful RAM and overall performance, and the GTX 970 clearly delivers on that front."
http://www.extremetech.com/extreme/198223-investigating-the-gtx-970-does-nvidias-penultimate-gpu-have-a-memory-problem/2
^^And the most popular GPU for Steam members is the ....wait for it...... GTX 970.
Finally, as I stated before, anyone who does not own the GPU has no credibility in the matter. None. Zip. Zilch. Nada. the vast majority of 970 owners never even knew there was a problem until it was reported.
I would have never challenged or mocked someone that their 480 essentially sucks because it can destroy their motherboard because like above, the
vast majority of users would not see that as an issue. I see no difference in mentalities there at all. Finally, back to the 970 being a "problem" card, I'll just let its 2015 sales number speak for itself.