You know, all that 150 stuff can't keep flying forever.
Depends if people want to restore them. There is a large international Cessna 120/140 association. Those folks have collectively rebuilt a lot of the type. Mechanically very similar to the 150. Early 150's were nosewheel 140's. Of course they scoff at the 140's progeny, the 150, unless converted to tailwheel. The association membership was not overly enthralled with the 162.
Bryan