Guess I just got careless about it?

The MBA is just a laptop I use for when going on trips. I don't use it otherwise, but next time, whatever I get, I'll know better and keep it current. I also have a 15" MBP, whose OS is current. The MBA that I have now, is 6 years old. Why would I buy one that's only a couple of years newer than the one I have now? If I'm going to buy another laptop, it'll have to be new. Hey, thanx for your input. It's appreciated. -Kathryne
P.S. My baby, the one I use everyday is my iMac, 27" desktop. And now, that one, I
do keep current w/o a doubt!