I think gps just gives a finer speed control than a wheel. If I want to tune my wave it’s done in .1 mph increments. Plus with the fly by wire throttle it’s always spot on. With a PP I think you can only adjust in 1-200rpm increments. That may be too much or not enough to hold your wave. But hey, I’ll admit I’m spoiled now.
What would we do without technology. Y’all are getting it done, and that’s all that matters!