So I was doing some digging earlier regarding some new tyres for the MR2, and was hunting for the right sizes in R888 on the Toyo website when I clicked on the 'Caution! Low temperature use' link. This used to say that they shouldn't be used under something like 7c, however it now reads that they shouldn't be used under -9c. That's a massive improvement, and certainly opens them up to far more usage than previously recommended. It very rarely hits -9c down here, so I'd be quite happy running them all year round I think.
Now clearly for daily drivers they're probably no use for most people, but for the keen driver this removes a huge obstacle that was previously there. I know most folks will never use them, but those that do will really see why this is great news.