I remember thinking "too little, too late" when IBM launched its x86 line (the IBM 5150 PC with 8088 CPU) in 1981.
Damn, over 30 years later and we're still stuck with a variant of that architecture!
Too little, too late? You missed the target methinks. They dictated the architecture which is on desks these days, and made Microsoft unbelievably rich with that little oversight, letting Gates sell his version of DOS, too.
Where they utterly blew it, though, was in pursuing the regrettable PS/2 line up. Horrible machines which locked you into horrible upgrade paths. It was shortly afterwards they began shedding people so fast I didn't know which salesman I was talking to from week to week when we were acquiring an RS6000 for some stupid purpose.