Re: 90% market share
Samsung could probably buy the whole company with the spare change in the couch in the office of their CEO
Quite possibly but if it did it would destroy what makes ARM so attractive to all those licence-holders: none is in an unassailable position and they all get to share the pie. This is essential to compete in the embedded market where only huge volumes bring in meaningful revenue but is getting even more interesting as the capabilities (and power draw) of ARM and x86 start to converge. Not a few of those manufacturers are eyeing that $50 bn Intel figure and wondering just how much of that they'll get if ARM continues to grow.
Also, none of the licence-holders needs to worry about ARM taking their business: it doesn't make chips, doesn't have the engineers, and probably more importantly, the billions lying around for fabs.