I agree to an extent, don't get me wrong id love to hear a field full of 2 strokes at a national getting it on. That has to be the sweetest sound ever, and the smell of premix in the Georgia Dome, i wish they made air freshners that smelled that good.
Im sure the greenies have something to do with the death of the 2 stroke, but honestly I think its just evolution of the sport. There is a place for both bikes, outdoors four strokes own the track. Carmicheal even said that in an interview after he got beat heads up by Windam in like 05. Before Kawi came out with the 4 stroke, they built James Stewart a 250 that he even said was scary to ride. The problem was trying to ride a 250 with that much power for 30min trying to keep up with the Goat on a 450. Indoors the 2 stroke is missed, Chad Reed's lap times on the 250 were faster than on the 450 when compared side by side. He was pressured into riding the 450 cause thats where R&D money was being spent. 125's on the other hand needed more dispacement to run with the 250 period. Yeah Travis Preston did win a championship on a cr125 with 250f's in the mix. You can't compare James Stewarts performance on a 125, well because he James Stewart. In the Hare Scramble/Enduro scene here on the east coast 2 strokes make up more than half the field. Mainly cause of weight and its not trying to pull yours arms off for hours like the 450.
Sorry for the long post, its just my opinion. Now back on topic?