Opinions will vary. I knew an old guy when I was a teenager that never changed the oil in his cars or trucks. Just the filter. His logic was that oil cannot be broken down. Must admit, his old Datsun truck was still running when he died. Didn't smoke either. Go figure.
Many people don't believe in changing transmission, rear end, power steering, brake fluids. They just drive it till it needs a new whatever.
2011 F350 4x4 XL Crew Cab Dually
2010 Keystone Fuzion 405 Toyhauler