On a trimmer the four is good in Honda form at least but a gimmick in a chainsaw. You don't need the added bulk and weight and the worry about lubrication.

Stihl have gone for a compromise with their four mix range where they fire every alternate TDC but the oil is mixed into the fuel two stroke style. I can't work out the advantage except for emissions.

Ahh, if only victa had kept producing the thumblatch catcher series, they would be in better shape today!