ANY time you buy into technology-enabled DRM-style licensing, you're stuck being dependent on the company still being around when your machine finally needs replacement or upgrade.
Not necessarily. I bought into
Living Cookbook and had tons of good recipes in it when the company went tits up and their authentication servers disappeared. Kaspersky dicking with my network interfaces then did for my PC and that's it. We're surviving on beans on toast now. It's very annoying.
But that's one I didn't have my eye on. Usually, I will find a hack for something I want to buy, and then buy it. Sometimes I buy first and then find a hack, but that's not always successful. In the case of AD I am confident that should the worst happen I can still work with the version I have, regardless of PC, one way or another.