How long might armored cruisers have lasted without war?

Without the First World War, when would the last large armored cruisers probably have been withdrawn?

Probably between about 1916 and 1920.

A viewer asks how long the big armored cruisers might have survived had the First World War not intervened. Their likely withdrawal falls between about 1916 and 1920. That estimate does not make them permanent assets or first-line battle units. It supports retaining them through the period when war actually created exceptional demand for patrol, convoy, and overseas hulls.