The only period I've "missed" -- by intention -- is from 2010 to the present. I mean, that whole era has been a time of vastly dimenishing returns, especially in regards to Intel CPUs. It has been a terrible time of castratation as well, ie, of eliminating compability of older code, functions, and needless abandonment of same. The bloat, the "walled garden" aspects, the control aspect of two or three companies (I'm looking at the big A, the big G and the big M) have made the hobby of being a computerist very frustrating indeed. Coupled with runaway greed of those selling older hardware and the rampant commercialization of nearly *any* "retro" hardware, whether it actually has value or not, has been enough for me to almost give up the hobby completely. I am glad to have been a very active participant from the late '70s until 2010 or so when the first Intel Core systems were released (I stopped at the i7 2600k when compatibility of DMA, sound, and video was castrated and DOS compatbility of those Intel core systems was very poor indeed, so Intel could save a few pennies.)
As far as gaming, I feel that I've missed *nothing* by not following the last ~15 years. In fact, I've only benefitted since I've missed all the bloat, "emoting", $3000 video cards, and ridiculous system requirements, while the quality of games has vastly diminished since its heydey in the early - late '90s.