I dont agree about the water conditions making a huge difference
For a TT maybe yes - but a raceboard will fly over the chop usually.
And in waves, however small, I will say I get going earlier/faster because you can utilize the wave power or backsides, to get planing - and once up, you work in sync with the waves both ways - so actually easier often (if used to waves that is...)
I dont find super smooth water to be way better than small chop, regarding how early I start on a raceboard
Just a very different opinion and experience, I know
Of course you can maximize your upwind angle more in totally flat water, no doubt.
But the difference in planing is extremely small IMO, for raceboards or even waveboards.