Counterfactual detail weakens as assumptions accumulate

What happens if navies adopt gas turbines immediately before the Second World War in this timeline?

The question sits too many assumptions beyond the original divergence for a specific answer, so later predictions should remain broad.

Early adoption of gas turbines requires too many additional assumptions to support a specific answer. Detailed ship predictions stay close to the 1920s, where known designs and immediate policy choices still provide firm anchors. Farther into the alternate timeline, wars, procurement, and technology would diverge in ways that compound one another. Later conclusions therefore remain at the level of broad forces rather than precise designs or dates.