Just to jump in here. I have an iPad 1 that is fully functional and that runs all of the apps that I want to run on it. It is not obsolete. It still works just fine. And as several posters have pointed out, there are links you can go to to download apps that are still compatible with your device. Also, you don't seem to get it that if the apps cannot be run on your device, and if there are no versions of the apps that you want that can be run on your device, your beef should be with the developers.
All Apple apps that were available when the iPad 1 was introduced run perfectly well on an iPad 1. Apps from other developers that no longer run on iOS 5.1.1 is by the choice of the developer who has decided to no longer support a version that will run on that level of iOS. Take it up with them. And don't be so hasty to write off your iPad. It works fine with the apps that run on it, and you have a large selection of apps that will do that.
And again, the world of technology is a fast-moving world. New developments, new functionality, new processing power, new advances occur every day in the world of technology. Your saying that a navigation system is not required to run a car is no different than us saying that some newly developed app is not required to run your iPad either. No matter how much you might want a navigation system in your car, you are not going to get it in a model that cannot support it. And no matter how much you want some brand new cutting-edge app on your iPad, you are not going to get it in a model that cannot support it.
If you want the latest and greatest, then you are going to have to have the latest and greatest hardware to run it.
Sorry, but that's just the way of the world of technology.
GB