The average backpacker is a 2-season sleeper (summer & fall). Spring usually still has too much snow (and crappy snow at that). I do all of my backpacking at higher elevations (7000 - 10000 feet), and it is very common to get 30* night-time temps.
I think what is missing on this site is the equivalent of Shug's videos for noobs. Shug put a lot of time into videos and folks would be hard pressed to find a better source for basic info. But Shug didn't spend a lot of time on pads, and Shug focussed a lot on winter hanging.
What is needed, IMHO, is a good, better, best rating of bottom insulations. That way a person can understand better what they are getting for their money. And avoid mistakes.