Oh, please ~ Intel fucked up their 10nm process pretty hard, and they kept trying to fix it for years. They also had to keep pushing their roadmap back again and again for 10nm.

This is entirely due to Intel's awful management getting in the way. Intel's engineers might be clever, but with shitty management, that can all go to waste.

Intel's management have been sitting on their arses, more or less, when you consider the fact that they've really been dragging their feet in terms of progress.

AMD has made more progress in 3 years than Intel has made in 10...

Intel simply got too comfortable with their monopoly.