Hmm, should I respond, or not? Well, I guess I'm committed already.
Vehicle obsolescence is a reality that happens to every vehicle owner every time they purchase a vehicle. The next model year something will change, or improve. That is how car companies continue to entice folks into buying new vehicles, is by keeping platforms evolving. That is just logic. If it weren't for the progressive activity of vehicle designers, we would probably still be driving Model Ts and not know the difference.
It isn't in human nature to sit on your haunches and not improve or evolve. So, that means that this year's model year vehicles will be "obsolete" when the next model year comes out, or in a couple of model years when a redesign occurs. That is just how it goes. I've never been bothered by the ebb and flow of vehicle design changes. I know that when a vehicle wears out and no longer serves me properly, I will go out into the market and purchase something new that will be improved over my previous vehicle, however, I'm not going to stress now about any so called "obsolescence" of the vehicle I am driving currently.
Is the Prius obsolete? No, and not for a long time to come considering that Hybrids are not the rule, but the exception with regard to propulsive technology available in most vehicles.