I only shave when I feel my fitness warrants it.
The question is whether you want the free 0.015-0.02 m^2 lower drag and are you willing to shave once per week? This about the same as going from a loose jersey to an aero jersey, not hard to measure and quantify.
Wax strips work well for the initial mauling but they are expensive. I used barber shears to get them to a nub and then shave with cream and a razor.
I think there is also a vanity aspect, you showing off the muscles and vein type thing. Massage is definitely easier with shaved legs.