This came up as a result of the new dual drive system only having a throttle to begin with and the future option to add PAS.Ken, you go for your throttle only preference. Nobody here saying you can't/aren't allowed. I'm pretty sure some will even follow/agree with you. Just don't expect it to be real popular/universal given the other options.
"the programming has to make assumptions about how much assist is desired based on a sensor parameter that is not tied to rider effort in reality"
This is a wild guess on your part, and typical of the other misleading comments you've written. It's not accurate at all. It would be nice if you would take a time out and teach yourself how a controller really does work, or ask enough questions to build a better understanding prior to making more comments like this.
Until you get into the more exotic (expensive) stuff, there are only 2 sensors telling the controller what's going on. They are speed, and the other is cadence. That's it. Everything else is based on logic/programming (or lack of it).
And last, pretty sure there are others coming here to read about a new motor, NOT controller basics 101. Maybe we could move this conversation to a topic of it own? -Al
Here's what a professional says about cadence (not from me).
When pedals are turned slowly with lots of force, muscles tire quickly – not getting enough oxygen and blood to maintain the effort for long. Riding with a too high gear ratio, turning pedals slowly is similar to jumping from standing still – with both legs: lots of power in a short time, but quickly exhausting.
Turning pedals quickly, in a lower gear ratio is similar to walking fast, or running: heart and lungs work harder, but the effort can be maintained for a lot longer. And it quickly improves with training.
Optimal number of revolutions per minute is between 80 and 100 – depending on individual body and the level of training. The main function of changing gear ratios is remaining in that optimal range. Steep climbs are exception and revolutions often drop below 50 rpm, but on long climbs it helps having gearing “slow” enough to enable over 60 rpm.
Some were claiming cadence-only assist could be done effectively. I questioned that just based on the information above. Now you are adding speed as an input but there are still ???s on if the bike path is most straight or winding. Listen, I just ??? that there is a good PAS that doesn't include rider torque effort as an input because at least that is an indicator or the effort they providing as prediction for how much assist they want.
I truly believe that throttle-assist ebikes have been given a bad rap because so many have equated them to just riding like a motorcycle and not pedaling. Yes you can ride like that but you can also pedal and just feather the throttle to the assist you want while pedaling the entire time. I'm just making sure that throttle-assist only is not given a bad rap because the big players want to sell more complicated hardware.