In a past thread here, years ago we discussed the Audi A2, which was aero-modded by Chalmers University at MIRA in 2012.
One of the tricks they tried in the wind tunnel was was 'lowering.'
The A2 did not demonstrate any drag reduction.
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And I don't know of any economical way that a member or guest could 'simulate' lowering their car, just to 'see' if testing produced a significant enough benefit to justify the expense to provide 'active' suspension.
Just dropping a car, as others have already mentioned, is a recipe for ground strikes, and 'missing', or damaged components.
I have a collection of underbody aerodynamic bits from Corvettes, Firebirds, and some kind of Audis knocked off at a nasty intersection, and Kroger Supermarket driveway ramp in Denton, Texas.
