Software updates are improvements over the old code in those boxes so there should be nothing to fear of an update. Only exception is the ECU if you have a tune since I may prevent you from unloading and reloading your tune if needed.
I guess i'm concerned that to fix transmission shift issues, that they may neuter the car with the new software.... like the torque limited 04 & 05 Autos...
Yeah, that's the one of the downsides of an auto and one reason I'm glad I have a stick. I got the latest and greatest updates back in 2011 and the car works great so I have no concerns about staying at v2.0 for the rest of my car's lifetime.
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