Modern content creation workstations are incredibly powerful, but just how much faster is a system today versus one 2, 4, 6, or even 7 years ago?

Modern content creation workstations are incredibly powerful, but just how much faster is a system today versus one 2, 4, 6, or even 7 years ago?
Skylake-S introduces a number of changes compared to Haswell that makes it fairly attractive as a platform including the move to DDR4 RAM. It also uses less power, runs cooler, and has some very significant performance improvements in some applications.