Thank you very much for an excellent write-up, Marty! Your observations are so similar to mine! Allow me several remarks:
When the SL1.1 motor does not deliver any assistance, it becomes silent. The "sound of cicadas" comes from the rear-hub freewheel. As you live in the United States, it is hard for you to ride past the speed limiter. Here, with the speed restricted to 25 km/h, the motor silence mostly means you ride faster than the speed restriction (just on your own leg power). I often forget pushing a button to derestrict my Vado SL. If I can feel my thighs stiffer and there is no noise whatsoever, it means I'm pedalling alone (without the motor assistance).
I asked two different riding buddies of mine how they felt about the SL1.1 motor noise as we are riding side by side. Each of my mates said the motor noise was barely audible for them. One of them specifically remarked the SL motor noise felt pleasant to him, and he said himself he liked the fact the motor indicated it was working that way.
Such thinking is obsolete nowadays. Many girls ride male bikes (road or gravel, for instance), and many men choose ST or Low-Step for practical reasons. (Very few females ride in long skirts nowadays, for one). While I have to accept the fact my SL is high-step (there was no other option at the time I was buying it), I am so happy riding my big Vado in ST! On my off-road Vado ride of yesterday, I had to stop for many times. How convenient it was to get on and off the ST! Besides, I dismount my ST the same way I mount it. Not complicated if you keep your brake lever depressed for safety and use the handlebar as a support.
It's lovely!
Never say that! The appetite may grow the more you ride!