Absolutely. A company that goes through an extended period of growth and success can retain (cargo-cult style) all the approaches from that era even while the conditions change. That ossification is obviously not great unless the culture is especially adaptable.

And the conditions for most big tech companies have changed radically over the last few years. So the subtle devaluation or reinterpretation of culture is kind of inevitable when forever-growth turns into a zero-sum game. As you say, it might even be the veterans who are doing it.