opaque coolants, even those that advertise no "redeposition" do end up making clumps of particles everywhere. in fittings, in rads, in blocks...
And since the ceramic bearing of the pumps is water lubricated, you basically end up adding slightly abrasive slurry in the water.
long term damages aside, if you want to go back to clear coolant, it's a nightmare
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I used an opaque coolant once for 3 weeks, and have had cloudiness in my loop for the following two years despite numerous flushes, complete teardowns and manual scrubbings etc...
When i compare the rotor of my D5 and DDC, it's easy to see which one ran opaque. the D5 has lost all the plastic sheen on the rotor, yet the DDC has more run hours on clear coolants.