We won’t know until an AGI actually starts to act like one. In other words we won’t know until we know and then we are suddenly there.
That doesn’t mean I’m on the doomwagon. I feel kind of weird and contrarian but I am just not that afraid of AGI. For the foreseeable future AGI should be much more afraid of us. Imagine having us for gods. (I actually am a bit concerned that we will accidentally put a sentient mind in hell without knowing what we are doing. Would it know how to tell us? Would we care?)
As far as human survival I’m afraid of whatever it is that is going to get us that nobody including myself is thinking about. That’s not AGI. That’s the alien weapon for which Oumuamua was a spent deceleration stage. (To make up something random. It probably isn’t that.)
I disagree about physical limits with EVs. We are not near the physical limits of battery energy density. From what I have read a 2000 mile EV may be possible, albeit quite far out. But it was just a random contemporary example.