Only eight years for a dryer is definitely not pretty good in my mind. It's barely acceptable unless you have a huge family and are doing laundry daily. I had a low-end Capri (Sears house brand) that was 21 years old and still going strong when I moved away. It was serviced once, by me, to replace a fuse. If I'd paid twice as much and gotten only eight years out of one, I'd be furious.
Yeah-- I was thinking that 8 years isn't even broken-in. My old Sears dryer was 27 when I had to replace a pulley and a thermal fuse. It ran just like it was new after that. I left it with that house but, hopefully, it's still running today.