I have read and heard that poly bushings for the front of the LCA will cause the ride to become harsh. Is that the case?

Reason for asking is that I may do it in the future.

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2012 BMW X5 (Beef + Granite suspension model)

1995 E300D - The original humming machine (consumed by Flood 2017)
2000 E320 - The evolution (consumed by flood 2017)