In the past, I posted the lore and how they came into being. I was there and bought early production models. Stihls were on most of the loggin' shows I worked at until the 2100 came out. Then it became a sea of orange, even when I moved to CO.
I started out life with an 075, and what a heavy piece of junk by comparison.
You guys slave me with those 'D' handles and velocity stacks. No one has been able to prove any significant gain with a velocity stack on a 2100 and I've seen computer-generated flow/gain tests. You would have been laughed outa the woods with those handles, but yeah, I get it. At 70, I have no problems pulling over the 2100's. Usually, I plug any saw with a comp relief because I've seen them gunk up and rob compression. But whatever floats your boat!