I agree with most here, it's what works for you. When we bought our new TV last year the plan was to then sell my paid for 2000 Tacoma (with only 72K miles) to help offset the cost. My wife would keep her Camry.
A year later and I still have the Tacoma. The money may not make sense, but being older and retired what works for us is, with the Tacoma doing my daily stuff and a dedicated TV, we should never have to buy another truck.
Our plan is to try our best to wear that TV out. If we are around long enough to do that we will gladly buy another.