Windows 12 Enterprise would have the option, Windows 13 Enterpise would remove the option but allow for a signed "legacy" sandbox. Windows 14 Enterprise would have no option.
Sure, if we talk about decade or more, companies can and will adapt. They can run several apps in VM, or just migrate to Unix. I've worked at bank who was through and through completely Linux including all front desk people, in 2010. If rigid banks can do it, everybody can.
They can play the long game.