Decomp is standard from 50cc and up, to Ordinary Joe it makes sense.
My 72cc goes pop with a firm hand, but if its filled with one too many drags with the choke on - nope.
Same goes with my Dolmar 5105, though it does not have a decomp.
50cc and up? I guess that's a modern saw thing; of the dozens of saws that I have, the 026 Pro (produced 1996-2002) is the newest. Only other saws that I have with decomp are all over 110 cc (075/076, Jonsereds 110, etc). EDIT: forgot about the Jonsereds 90. It has a decomp.
Only saw that ever gave me trouble starting without a decomp was a Stihl Contra S - 137cc. Had to pull with conviction!