Years ago my main bike was a Specialized S-Works FSR (about 2001-ish, one of the early generation ones). Down South it was fine but then I moved to the Lakes and found that the bike, although a fantastic XC race machine, was simply getting battered by the harsher terrain and weather.
So I bought a Cove Stiffee (back then the choice of 'hardcore hardtail' was limited to Stiffee or SC Chameleon) and never looked back. I've never yet found a situation where the Stiffee has been lacking. My skills have certainly been lacking but the bike will do anything - maybe not quite as fast as a full sus in some circumstances but I can live with that. It's done all-day epics in the Peaks/Lakes/etc, been to Colorado, Utah, Pyrenees, Alps etc etc.
Top bike, really good fun to ride, much simpler than a full-sus to maintain.
But I've still got my race bike, a full-sus and I wouldn't be without it.