eBike technology explained

Hey everyone!

I've been riding my eMTB (a full-suspension with a Bosch Performance CX motor) for a few months now, and I'm absolutely loving how it tackles steep climbs on our local trails – it feels like magic! But sometimes I find myself wondering about the actual tech behind it all.

Like, how exactly does the torque sensor work to give that smooth power delivery, or what's the real difference between hub and mid-drive motors in terms of efficiency and wear? I'm curious to hear from others who might have insights or even just questions about the "how" behind their eBikes. What tech aspects fascinate or confuse you most?