Hell, 20 years ago when I worked at Walmart we usually had about half the registers open most days. More when we were expecting a crowd. There was a fair amount of downtime, but not an excessive amount.

IIRC, the biggest uncertainty is about the singularity. I don’t know if it’s still true, but my understanding was that the consensus is that it isn’t really a true point of infinitely dense mass. That is how our current models say it must be, but many assumed our current models are incomplete and that more accurate ones will show that it must have some volume. And given the extreme nature of them, any updates to our models might have some significant repercussions in other aspects of them too.

Time is relarive to your frame of reference. You are always the source of your own frame of reference, so you can never feel the effect of time dilation on yourself. At worst, it would look like the universe outside the horizon started to accelerate to unimaginable speeds. But you would never feel trapped in an unending, at worst that is simply what it would look like to us.

So is New York City, lol.

My first thought was to scan it to see if they at least got Boston in the NYC section. Only to realize NYC is not in NYC but is actually in Nomansland.

Um, they very much did make promises to that effect. Neither were in good position to actually help the Poles when push came to shove, hence the Phony War. Brittain did some good with their navy, but neither could get enough troops to where it mattered to help, so they buckled down on ramping up their own war efforts at home to better mobilize. Did they fo it out of cowardice and throw the Poles to the wolves, or out of necessity because they would have been overrun had they over commited? That’s a question that has been the subject of much study. But they both very publicly and loudly commit to their defense, they simply failed to meaningfully uphold that commitment.

I mean, the obvious answer is instead of trying to divvy the sovereign nation between them, they should have stood up for them and defended them when the Nazis rolled in. Barring that, they should have liberated them, then left them the fuck alone. Even a stopped clock is right sometimes, this comparison is pretty clearly silly. They weren’t lamenting the lives of Nazis lost in the battle to push them out of Poland. They were lamenting the lives of the Poles after falling under the Russian boot, after the battles were won.

It is definitely possible to create that. The question is, will it ever be profitable, or cheap enough to be user made/controlled? I doubt it. Tech growth isn’t just limited by what’s possible, but also by what’s practical.