eBike technology explained

Hey everyone! Hope you're all enjoying your Lectrics out there. I've been loving my XP 3.0 for daily commutes and weekend trail rides, and it's got me thinking a lot about the tech under the hood. Specifically, I'm curious about the different types of motor controllers and how they impact ride feel and efficiency. Does anyone have a good resource or explanation for how they work, especially in our Lectric bikes?