Avoiding historical imperial decline would not leave the British Empire permanently intact. The structure would instead evolve toward a more muscular Commonwealth, the direction British thinking had already taken. Choices such as India retaining a shared monarch would depend on diplomatic utility and perceived security. Political ties survive when members find them useful, rather than because decolonization simply stops.
Notable Point · 3:38:04-3:38:39
From empire to a more muscular Commonwealth
Even a less severe imperial decline would more plausibly produce a stronger Commonwealth than preserve the British Empire unchanged.