eBike technology explained

Hey everyone!

I'm diving deep into research for my next eBike, probably a full-suspension trail model, and I'm finding myself a bit overwhelmed by all the tech jargon. Things like torque sensors vs. cadence, different motor types (hub vs. mid-drive), and battery chemistries are popping up everywhere. For those of you who've been through this, what's one piece of eBike technology you wish you understood better before making your first purchase, especially if you ride varied terrain like me? Or, what's a tech detail that really surprised you with its impact on your riding experience?