This is a good thing. Intel had been acting similar to Sony in that they bounce from one thing to another while pushing the boundaries of what's possible (or trying to). They have also been resting on their laurels in that they did not optimize their designs much for efficiency and performance as they figured that the process node shrinks would help quite a bit in that regard. AMD and NVIDIA meanwhile have had to wring as much performance as possible out of the 28nm process node and did a tremendous job at it too. It's about time that Intel start to do the same for each viable process node.
I think this is a very important insight to make. Intel hasn't yet been forced to do a lot of the wizardry that nVidia and AMD had to execute for their current-gen parts, because Intel's been able to depend on process node shrinks and new architectures pretty reliably. And, in this industry, reliably means "on a consistent timescale, without having to spend totally ludicrous amounts of money".
Now that it's a ~3 year effort to "reliably" shrink process nodes, instead of 2, Intel has a gap that they have to fill with new parts after they've already refactored the architecture. So the logical thing to do is to optimize the architecture, and make lots of really small changes (rather than larger, higher-level ones, which define a CPU's "architecture").
They haven't done this before mostly because they haven't had to, and because it was more effortful in the past than simply investing time and money elsewhere elsewhere. But the times, they are a-changin'...
With
EUVL still in development and far from production ready, we're probably going to see an extended repeat of GPUs being stuck on 28nm and refining their design in the CPU realm.
I think 3 years for each process node shrink is going to be the new normal for a while. AMD and nVidia have taken forever because they don't own fabs like Intel does, and the cost for them to move to 16nm has been
insane until pretty recently. Intel's issues, comparatively, seemed to have to do with scalability and yield more than anything else.