Battery quality seems to have a lot to do with it.
My Toyota Hiace (twin batteries) original batteries were superb. I think I got at least twelve years out of them.
Just realised my van is seventeen years old now!
Amazing vehicle.
Mine will be 17 years old in May. Working from memory, I think I've replaced batteries (once), handbrake cable, timing belt (on the day I bought it) and tyres. 99,996 miles when I bought it 146,000 miles now.
Regular servicing helps, of course.
Vin