This- I have tried to strike a balance by using software efx, external dsp (Apollo 8 duo) and some hardware/ mic'Ed instruments so that I'm "load balancing" my music making. (Ok I admit it's just gear lust). I have a late 2014 with the 512 ssd and I notice a lot of peaking in hd activity during and for a few seconds after recording. It's somewhat related to latency but still more than I expect. Anyone else see this?