I have used my SD to power my old Toughbook running XP....
Mostly the computers I buy are lease returns, so I tend to be a year or so behind the curve.
Except for my laptops, they are older than that. Basically each of my laptops has a specific job to do, and as long as they run, are stable and complete their tasks, I will not replace them.
Long ago I decided to use multiple machines, each with one task, but each able to perform any of the tasks (basically one runs audio analyzing software, one performs playback, and one records).
I have had people scoff at my arrangement, whip out their latest and greatest laptop du jour that can DO EVERYTHING!!!, then get all bound up when their machine freezes and they are dead in the water.
I suppose if someone else were paying, I would like to have all brand new gear, but by using older machines, I am able to maintain a level of redundancy which I would not like to trade away.
I did have to get the company to upgrade my work laptop due to software compatibility issues running ProTools !0 in conjunction with my DiGi mixing console..... It's just too cool to be able to multitrack live shows with nothing more than a laptop and two minutes of digital patching.
But, it just won't work on XP, and it really likes more than 4g of ram