In tech, large successful companies very rarely never lose their existing market. They generally falter when they fail to compete in a new, bigger market that

In tech, large successful companies very rarely never lose their existing market. They generally falter when they fail to compete in a new, bigger market that makes their existing market relatively insignificant. IBM didn't lose the main frame market. The Microsoft/Intel PC market just made it pale in comparison. Microsoft never lost the PC OS and apps market. The size of the smartphone market just made the PC market pale by comparison.