I'm also looking at Alexa and the stupid plug someone got me for a gift. Sure, I use it "Alex turn on the lamp" but I know that the system is totally unnecessarily dependent on the internet and two distinct companies for that to work. I would never have purchased such nonsense for myself.
People in tech have strange ideas about what it means for something to work acceptably.
> On the other hand, it's probably no more inconvenient than locking yourself out...
It looks like local control (i.e., with physical access) wasn't affected, so the only convenience lost was remote access. Not great when you've bought the product specifically for that feature of course, but still much better than locking yourself out.
But yes, that's the risk of relying on a system as unreliable as the internet for such a task.
On the other hand, it's probably no more inconvenient than locking yourself out, something that happens every now and again for anyone. Except you don't have yourself to blame, but Nest.