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Former Intel CPU engineer details how internal x86-64 efforts were suppressed prior to AMD64's success
(www.tomshardware.com)
This is a most excellent place for technology news and articles.
The concept you are describing is called Innovator's Dilemma and imo the most recent example for it happening is with legacy car manufacturers missing the ev transition, because it would eat into their margins from ICE. But i am not sure if this is a good example for it.
However imo it seems like a great example for what Steve Jobs describes in this video about the failure of Xerox. Namely that in a monopoly position marketing people drive product people out of the decision making forums. Which seems exactly the case here where the concerns of an engineer were overruled by the higher ups, because it didn't fit within their product segmentation.