Another example of a long standing logo that got badly redesigned was BP. In the late 80s or early 90s (as I recall) the logo of some 35+ years was redesigned but it lasted no more than ten years. As I say, this is off the top of memory.
If you search for BP logo redesign, you may be as amused as I was to see the way in which folk replied to the BP rig disaster in the Gulf of Mexico. The internet allows a reply never previously possible.
A new generation arrive and have to justify their existance and the bosses let them as they think the young people have some secret elixir. Whereas, it should be a combination of new thinking, with old experience.
Expect cr@p redesigns to continue!