I still use my "classic" MS and it works great, too. I suspect it will continue to do so for a very long time, and much longer than your iPad.
It's possible you're conflating a view of your car's obsolescence with your desire for new shiny things. Your Tesla isn't remotely obsolete so long as it can drive on the road with other vehicles. If your concern is that Tesla's moving the bar so quickly that autonomous driving will be the only way to get around, then every car is becoming obsolete. As I mentioned upthread, your Tesla is still a better car than almost every one other one you pass on the road. That will continue to be the case for a very long time.
You're welcome to want new things, and the latest version of a Tesla. But to say the lifecycle of a Tesla is short, or that your car is becoming obsolete, is completely erroneous.