Like many others have mentioned, Intel fell behind by multiple generations. It was busy trying to rule the market as a monopoly when in actuality it was a duopoly. Worse than the consumer sector is the datacenter business where many are choosing AMD's Epyc instead of Intel's Xeon.
This is a sector where being second best as a direct competitor means you don't exist.
This is a sector where being second best as a direct competitor means you don't exist.