I bought a 16 year old car because the price suits how rarely I use it. It's good to me because it's the newest car I've ever owned. However sitting in someone

I bought a 16 year old car because the price suits how rarely I use it. It's good to me because it's the newest car I've ever owned. However sitting in someone else's car I realise that I could get an extra 50 horsepower for the same fuel consumption, as well as working air conditioning, and a few other creature comforts. Yes, this car is simple in an almost brutalist fashion, and very easy to work on. There's also plenty of spare parts. But it's 16 years old and the bi-yearly inspections are getting scary. The last inspector pointed out that I'll need a new exhaust system soon. I'm not sure what is a fitting death for an old, dependable car once its maintenance becomes impractical. I feel the same way about an old laptop. My T510 is heavy, the battery life isn't great, and it's slow as molasses. I can't imagine carrying that behemoth around when I got used to a Macbook 12.