They are in use and "useable"..but thats about it..I don't remember saying they all became obsolete all the sudden.
however they are all slow if they run the latest versions of iOS.
They dont deliver a robust,smooth and fast -as they should- anymore.
I don't know why you resist,get over it,1GB in this day and age means poor performance and slow experience.it is very evident whike browsing the web..I have multiple devices and my iPad Mini 2 with just 1 GB is now real pain to use,so slow and annoying not to mention the horrible reloads in safari.thats the reason Apple themselves switched to 2GB on all their devices.
if you don't see slowdown,that simply means you havent used a proper,fast device yet.
Sorry but not buying your 2GB of bust theory. Most iPads being used to day by happy owners with 1GB RAM. A "proper device" is not limited by the RAM.
Ever think it could be YOU?
No sense in arguing as you "know" you are right and 90% of the iPad users do, too!