That's a little harsh on the history of the Tick-Tock roadmap. It didn't have its first real hiccup until 2014 with Haswell Refresh v Broadwell, and then Skylake was delivered on time a year later. It was Intel's complete failure to follow-up Skylake with a process shrink "Tick" that was—and still is—Intel's big problem. So it really worked out alright for Intel for about 8 years before hitting a wall.