Software Dilemma

I'm not going to name the item in question at the moment, because the issue's bound to come again with something else later. I figure that this is going to be an "evergreen" sort of question.

Anyway.

There's a piece of software I'm considering buying an update for tonight, because severe discount on offer, limited time offer.

Complication: I don't have the hardware needed to run it right now. I don't know when/if I'll be able to get that hardware. I *do* like using the software's older version with the hardware I *do* have at the moment.

Thoughts?