Dot 5 Silicone fluid opinions

TrailBeast said

The main problem I would have with swapping to Dot5 and not completely removing the old stuff would be that you would still have some fluid that absorbs water in the system, and very likely right where you didn't want it like in the caliper and cylinder bores.

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..some would argue the water absorption is a good thing.Silicon apparently does not absorb moisture so it will pool in any lo spots in your system and cause corrosion more quickly.
..these arguments could go on forever but either will work well in our cars.For a race car the higher boiling point of dot 4 or 5 is necessary whether it's silicon or not.