40 degree temperature won't get your RR tires race track ready, if that's what you are referring to. That's why they have tire warmers. However, a short ride around the neighbourhood, a quick fun down the interstate, a leisurely commute to work, the RR tires are more than ready for that in temperatures much lower than 40s. lower your tire pressure a couple of psi, ride at 40-50 mph for 10 mins, your tires will be plenty warm for street use.
RR is a very powerful bike indeed. that doesn't mean your choices are only between stop and WOT though. A street legal bike that is capable of triple digital speed is also capable of crawling with stop and go traffic slower than a pedestrian. If you can't ride the RR in 40s without tires slipping left and right, you really should adjust your riding style to suit the condition. It is not that hard!!
In addition, if you follow manufacturer's recommendations, you should shift to sixth gear when reach speed greater than 30mph... I am sure none of us fail to follow that.
Do yourself a favor and check with the manufacturer of the tire you are using. Certainly we can ride very cautiously on any tire. But you are wrong about the tire getting up to temp. Pilot Road 3 for instance has a wide operating range - however the manufacturer puts that range at 40 degrees and above. When you are using softer compound tires that are designed to give superior grip they are absolutely heat dependent.
I'm not arguing that we can ride in 0 degree weather - I'm stating fact that riding on sport tires in 40 degree temps or less you are not getting the tire up to temp.
Don't believe me do a simple test yourself - go for your 10 mile ride and pull over and feel your tires - they will not even feel warm.
Getting any tire warm in cold weather is problematic but many tires have better compounds and tread patterns for this.
Trust me I'm all about riding year round - I average 300 days a year so I have my days of bad road conditions.
My RR is parked for the winter - not worth it to me to put on a touring tire just to go out for a quick ride. I had my RR sliding during a very conservative ride a few weeks ago - K3's just about new - temp was right around 40 - tires were cold to the touch when I pulled into my garage after about 20 miles.
Heck the only bike that I really ride this time of year is my KLR - no real HP spinning up the rear wheel and just a great bike to ride when I'm looking to just go for a ride and not trying to beat the world.
My K1300S has traction control and I have more sport touring tires on it and I don't go out of my way to ride it in this cold weather.
Heck who cares - what do I know - I only have a couple hundred thousand miles of riding under my belt.
Okay I'm done its all good.