I'm pretty safe in assuming they either enter a new business or don't for some reason. The some reason would be that they aren't able to actually do it. No one

I'm pretty safe in assuming they either enter a new business or don't for some reason. The some reason would be that they aren't able to actually do it. No one just goes out of business; read a story about a failing business and there will invariably be a series of attempts they made to rethink their operation, failed acquisitions, etc. So there we have to go back to the original argument: do they have a choice? I'm claiming their choice is the strategy they employ, they don't have control over the outcome, obviously. The only case where you don't have a choice is when there's a sudden shock to your business; new laws put in place or something like mesothelioma crushing Lloyds. I don't think this applies because the changes we're talking about here are not sudden at all. It's also not an all or nothing affair: you don't have to completely shut down one operation to start doing something else. But other corporations can gradually enter and exit different lines of business, and this happens all the time. Restaurant chains are a confusing example since they're really a mess of franchises. Even there, the parent corporation can create new branding and restauarant layout and effectively move into a new line of business.