Future Timeline

Intel has removed its "Lakefield" processors from the market after a very short period, and has no plans to resume sales. They were the first processors with "three-dimensional" architecture (though some argued that they JUST BARELY met the definition) to be commercially available.

This is yet another setback for the rise of 3D processors, the promised "paradigm shift" we've been hearing about since the 2000s. Old-fashioned 2D chips seem to have more room for improvement left in them than anyone predicted, and manufacturing 3D chips has proven more stubbornly problematic than most predicted as well.
https://www.extremetech.com/computing/3 ... hybrid-cpu

Lakefield in practice did not bring anything substantial. Only Milan-X 3D processors this year will bring substantial improvements for servers, in double digit percentages. New 64 core CPUs will have 768 MB of L3 Cache, so it is probable that 96 core CPUs will have 1152 MB of L3 Cache, making them the first CPUs to cross 1 GB of total cache.