How a Dreadnought might have survived for preservation

How could an early dreadnought plausibly have survived to become a museum ship?

It might have been retained for secondary duties such as accommodation, survived long enough to be recognised as historically unique, and then been saved instead of scrapped.

The answer imagines an early dreadnought retained in service and converted for accommodation or other second-line duties. Conversion before or after the First World War could have left the hull useful at a major anchorage such as Scapa Flow after its fighting value had disappeared. Such a ship might then survive the Second World War and later be recognised as the last of its type. Restoring the vessel as a museum would still require recovering or fabricating removed turrets and other equipment. The thought experiment shows how preservation often depends less on initial fame than on a useful later role and a timely decision to save the hull.