48v is a pretty big leap forward that I bet other automakers will replicate. So is assembling the interior (seats, console, etc.) onto the battery and lifting it into the vehicle. Also, the rigid wire harness that can be snapped in by robotic arms. The list goes on. I recommend watching some of the teardown videos.
In some ways, Tesla gets too much credit for innovation. Their cars aren't the cheapest, their charging curves aren't the fastest, and their range isn't the highest.
But the balance of all three attributes often makes them the best choice within their segment.
CT is an exception at the moment. It'd be really hard to pick it over the Silverado EV.