I think China and the EU will replace USA and Russia as the two world superpowers.
UK and Canada will be kind-of part of the EU in much the same way that they were kind-of part of the USA in the post WW2 era.

Also four of the teens. "teen" has 2 es in it so you don't need to check further than that.

It did give its usual overly verbose screed about how it got to that answer.
Basically it ran through a load of odd numbers to see if they had ees in them. All of them did, but it thought some didn't.

Correct answer, wrong workings / methodology.
You also have to consider "eleven", and the teens. Some odd numbers have those rather than the single digit numbers it considered.
But they also have ees in them, so the eventual answer is correct.

Single digits:
One, three, five, seven, and nine all have at least one e in them

10 + single digit
Eleven and the teens have at least two e in them

Everything else is a compound word containing one of the above.

I asked it to give me 5 odd numbers that don't have the letter e in them. Trick question, because there aren't any.

It came back with:

Twenty-one
Thirty-one
Forty-one
Fifty-one
Sixty-three

For the most part they don't have save buttons, things automatically save as you edit them.
Generally, you can click "Share" followed by "Save to files", and "Save to files" has a folder icon.

Does the fact you can buy them from Best Buy and similar places affect your assessment of that?

On the hardware side of things, there are of course a lot more alternatives than just Samsung and Apple, so I don't think there is a problem there.

The App Store situation is different though because there's only two of them, and they are not direct competitors.

The competition is Tesla / BYD / etc. Not other dealerships.

I had a smartphone 20 years ago, but it was an O2 XDA 2 (HTC Andes) which is now utterly obsolete.

If you are driving a lorry load of lemons from Sicily in southern Italy to Dartford in the south east of England, that is a 29 hour drive assuming no rest breaks.

Even if you are driving between Glasgow (Scotland) and London (England), about 8 hours, then realistically you are only doing a run in one direction each day. Or sometimes, if it is a big company, the drivers might meet up half-way and swap vehicles.

No, the heat pump will use more electricity than the heat engine will turn back into electricity.

It is Italy, not Greenland. For most of the year, the local residents are going to want cooling, not heating.
Even in Scotland, people don't want heating right now.

I have a Thunderbolt 3 to Thunderbolt 2 adapter and a Thunderbolt 2 to Firewire 800 adapter. String those together, with a Firewire 800 to 400 cable if necessary, and I can connect all my firewire devices to my MacBook.

Which at the time would have been known as the "useless serial bus".