The amount of people you have living in your house is probably the most underrated variable of appliance longevity and utility bills. I have five adults. Two college graduates who still grace me with their presence, and a freshman in college who is attending the local junior college for her first year. My wife complains about our utility bills and I add to that why it seems like I'm always fixing or replacing one of our appliances. Meanwhile my best friend from high school lives in a similarly sized house but has managed to stay single his entire life. Needless to say, he still has all the same appliances that came with his house when he bought it over twenty -five years ago and it blows him away when I tell him what my electric bill is compared to his.