Please take this as it is meant. The biggest barrier for anyone in learning anything new is unlearning what they think they know. Particularly when they do have a partial picture that is somewhat accurate in so far as it goes. That is a tendency that I have had to fight, and one that I strongly see you as having.
Your comment about not being able to restructure on a dime is accurate. Your two CORRECTLYs are accurately judged nearly impossible, and attested to by a trail of corpses. (The one success he identified resulted in the burnout of the CEO who succeeded, and a large fraction of the company along with him. The company did, however, survive a transition that killecd.)
Therefore it sucks to be the established company, no hope. Right?
However despite the impossibility of getting your CORRECTLY right, there is a strategy which has worked for several companies and seems likely to be able to continue to work. And it isn't even hard advice to give. Proof: after analysis of what various CEOs have tried, what hasn't worked, and what has, he gives the necessary advice and spends a sample chapter on how automobile companies should address the challenge of electric cars. (At current rates of technological progress they will become an issue around 2030, give or take a decade.)
Cheers,
Ben