A program that is no longer supported will surely have a limited shelf life. All it will take is a change in Windows, the C++ runtime library, or a driver and you could be out of business with no recourse. Sure, it may work for a year, and I'll continue to use it, but I don't want to wait until it's dead to make other plans.
By the way: here's some research:
Reaper: For non-professional use $60, Professional: $225
Steinberg Cubase: Elements $99, Artist $309.99, Professional $559.99
Avid Protools: $24.92 per month or $599 for the Perpetual version (sounds like "lifetime".... buyer beware)
Presonus Studio One 3: Artist $49, Professional $349, Crossgrade from Sonar X3 and newer $299.
Those are the only ones I've researched so far. Trying some demos to see which I like best.