I dearly wish both Cessna and Piper would stop producing their original models. I've nothing against the C150, C172, PA28 as I had many years of wonderful flying in them BUT all are almost half the age of the history of powered flight.
Keeping designs which originated in the 1950's with engines of the same period hasn't done much for the advancement of GA. I'd like to see both Cessna and Piper continue but they have to move on..
jb