Only you can make that decision. Some people trade every few years to keep things new and under warranty and already have a payment.
We bought our 1996 Carriage to live in fulltime and to use & not worry about depreciation. We upgraded something every few years and in 2010 decided instead of buying new with a long term payment to just have the outside stripped down and painted even the graphics and do a freshen up inside we had a very low and short term loan and figure we're good to go another 18 years. This is what works for us and has been the best decision.
If you love it and enjoy it, why worry about tomorrow or next year or depreciation? Enjoy what you've got and when you no longer like the looks, either fix it up or buy a new one.
To me anything driven off the lot will never get you enough money to buy a new one. Hugs, Di