For me, it was buying a graphics card that was endorsed by Intel that turned out to not support any of the advanced graphics that were happening at the time. I

For me, it was buying a graphics card that was endorsed by Intel that turned out to not support any of the advanced graphics that were happening at the time. I was less than happy. I think Matrox, back in the day, was also a bit of a disappointment. Supposedly they supported standards and were going to be amazing. Reality is they were not amazing.