Moron this.
I used to run the bars much lower than the saddle, and a 48t chain ring. But in urban riding around here keeping an eye on other vehicles takes priority. Also at 70yo the speeds I'm "going" rolling resistance, and low rotating mass for acceleration help as much as aero. For me XC= Extreme Comfort. In urban South Florida riding around staring at the top of your front tire doesn't work very well. If I want to get somewhere in a hurry I take the 1500W Ebike, which is also Front Freewheel, and Rapid Rise. Shifts just like an Alfine 8. Except I can replace most of it cheaply and easily when it wears out. Still sitting upright though. 24Ah battery does the aero for me. Chain and cassette pair are good for about 6 months.
I'll keep an eye out for Vindegaard. In my rear view mirror.....