They’re not as common. I think most people either use a coffee maker (for coffee), or their microwaves to heat water. However, I have an electric kettle in my office for tea. One thing you may notice in the US vs Europe in that regard is that the standard outlet is 120V, so most small appliances can’t pull as much power as their 240V counterparts in Europe. So my electric kettle is probably a little slower than yours.

I mostly threw these out of the top of my head. You’re mostly correct:

• most people use cards, not checks, but they’re still widely in use. For example if you’re paying a handyman, piano teacher, or just dealing with someone older, or someone who just doesn’t have other ways to receive payment
• I’m in rural Ohio so I see Amish on the roads all the time. They’re not where it is expressly forbidden, like a divided highway, but you can find them on roads with speed limits around 50 or 55 at times
• For the windows, the sliding style is what is weird to Europeans. We mostly use the kind that swings out in one direction it the other. American windows make more sense when you take into account that they have screens on them. (I forgot to list screens.)

The societal problems if the US has been covered by others, but here are some culture shock ones I’ve experienced, in no particular order:

• still use personal checks
• put down knife after cutting your food, move fork to dominant hand
• drive through everything, including alcohol purchases
• horse and buggy on highway
• doorknobs instead of handles
• almost everyone has air conditioning, so doors and windows stay closed in summer
• double hung windows
• carry water bottles everywhere
• gas stoves and ovens are by far more popular than electric by a good margin
• in sink garbage disposals