I wouldn't expect thinning of the fluid. It will oxidize over time. However, automatic transmissions are not particularly sensitive to fluid viscosity. Look at the viscosity differencs between Dexron III and Dexron VI, and those are both acceptable for many transmissions.

As expected, the fluid isn't wearing out at this point. There is no reason to change it based on the fluid report. On the other hand, if you want to change it at twice this mileage on the assumption that it may be worn out by then, it isn't a bad idea to change it now to clean out the deposits that have accumulated over time.

What changes with auto trans fluid is the additives and friction modifiers, and traditional fluid analysis doesn't address those issues.

Particle count matters, but it doesn't look high in this case. Wear metals aren't an indicator for the fluid condition, they are an indicator of the transmission wear.

Thanks to the OP for posting this.

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