I think the fact that Tesla "gave away" all their patents is a sign that this isn't a battle over technology, but a game of marketing, branding, and efficient manufacturing. I seriously doubt Tesla has some secret factory sauce that Nissan (who's been building cars for decades) doesn't have access to.
I disagree with this. The key isn't the technology but building the better driving experience.
If someone comes out with a vehicle with on demand torque, a 0-60 time under 5.5s, excellent handling, and most importantly, great styling and interior, I'd consider it. Tesla vehicles are able to stand on the merits of the driving experience, EV or not. That's not something no other EV manufacturer can currently say.