In the old days av gas was the way to go,hi-octane. The stuff to buy was called 100/130,real high octane.It smelled fantastic,and my muslecar and motorcycle loved it. but some time long ago they stopped making it period. The stuff today may not be even as good as premium pump gas. I cooked a piston in my snowmobile trying the modern stuff,but the guy at the airport tried to tell me it was low octane stuff,so he was right. You gotta buy car race gas,but why you'd need it in a 2-stroke I don't know. Todays premium pump gas will make any hot 2-stroke happy,except I would never used methanol blended gas in a race saw.
100LL has not changed in many years. That is the blue AV gas. The 130 AV gas is green. They also made 87 AV gas which was red, for real old prop planes.
I have used 100LL in 2-strokes without incident for many years now.
It does have lead which poses a health issue. Don't huff the vapor or burnt fumes, and avoid skin contact. Be careful cleaning up combustion chamber and muffler, use gloves.
100 octane is overkill for most saws and it will require a retune. But the fuel, mixed or straight up will store for years. It won't eat the rubber parts up in a saw, or leave snotty residue in the fuel system.
If you cooked a piston in your sled, don't blame 100LL.
Cars? I ran one with 12:1 CR and used both the blue and green AV gas. The green was more octane than needed even at 12:1 CR and I cut it with good pump gas. Back then Cam 2 "race car gas" was twice the price of 100LL, and didn't run any better.