probably not what you are looking for in a response, but here goes. A granite counter-top has a life expectancy of 100 years. Maybe you replace it in 25 years due to aesthetics. Your grill, smoker, pit ... your cooker of choice ... will it last 25 years, will the technology stand up? This uncertainty has me avoiding built in units vs something I can move and swap out if needed. This coming from a guy who just spent a small fortune on a smoker that is built to last a lifetime.
DK