Or, you could buy a battery bank, which would be a lot cheaper, and because it is a lot more efficient, you get to sell a lot more of the electricity you capture at the later date when it is wanted.

50% efficiency to convert electricity to methanol, vs about 90% to charge a battery. A combustion engine has an efficiency of about 33%, vs 90% for an electric motor. A battery is also far cheaper than this thing.

"people pay fines all the damn time without involving the courts"
Presumably by pleading guilty on the summons? But if they have the right to plead not guilty and have their day in court, then there's no problem with that.

Cards with lower interest rates will generally have lower or no rewards. If you are someone who always pays off the balance in full, that is not the card you want to pick. You want to pick the one with the best rewards regardless of interest rate.

If I'm outside of the UK, I usually use a debit card for that, because I can have one in the currency of the country I'm visiting and it usually works out cheaper than foreign transaction fees on a credit card. That generally works just fine.

Yes, because with that level of cross-border complexity, nothing else is going to work.
Sales tax / VAT for example. That will be a number of exports from their sales and stock movements system in csv format that get converted into formats that can be used with tax software in all the countries the operate in.

High speed rail in other parts of the world travels at about 200mph.

The Great Western Railway running between London (England) and Swansea (Wales) managed it in the 1830s.

You definitely bore through mountains, like for example the Gotthard Base Tunnel in Switzerland.

I know who Napster was, about 25 years ago.
But who are they now, other than some zombie trademark?

Have grade-separated tracks that go above or below the roads.

You would an entirely separate high-speed track and not have freight running on it.

Quicker than Apple or Google Pay?

In previous ransomware attacks against government computers, such as NHS England, NHS Scotland, British Library, various school trusts, and some local councils, they have not paid the ransom.

We do need to ban ransom payments from the private sector to make the business model of these gangs not work. There is no other way to do it.

In the UK you quite often see different eat in and take-away prices listed to reflect the fact that tax rates are different.