Not for me. I got stranded once due to a battery that was 6 years old. Cost $90 tow bill, and $80 diagnostic fee (took them over an hour to realize it was the battery - engine would crank over and start, when you let off the key, it would die).

So had (it was the bosses truck) the battery been changed for a cost of $89, we'd have saved at least that much AND I'd not have lost three hours of productivity that day.

I change my batteries in their fourth year now.