Agreed, but does that give them the right to retrospectively change the life of components of an aircraft they never built?
Avgas 172,
Cessna built Cessnas, period. The corporation has been a continuous entity since it was founded. Who the shareholders of Cessna were at any particular time is not relevant.
The whole SIDs program didn't just "happen", there are several Acts of Congress, that started with aging airline aircraft, driving the process.
Given what I have seen in stripped down airframes, I would not buy any strutted Cessna older than about 15 years, unless the wings had been rebuilt, including the multilayer spars from the root to the strut attach point.
Tootle pip!!