I've been told there is a basically a 10 year lifespan on EVERY appliance that goes in a home now regardless of price. Don't know if it's true, but I've been in my house for 8 years and we got new everything and it's generally my experience, stuff is already starting to wear out.
I've heard this well but wonder how true it really is. I think for some things it's kind of like a cell phone where people would rather just buy new and get all the new features instead of fixing it. We've lived in our house, which was new in 2005, for 15 years now and we haven't had to replace anything. We have the most generic Whirlpool washer and dryer you could buy in 2005 and have zero problems. Last week we decided to buy an LG washer (top load) and dryer just to be cautious. Next year we'll probably replace our water heater even though it has run fine for 15 years and I'm sure the AC/Furnace will also be replaced soon even though we've had no issues.