I like that the museums are free. :-)

Same here! Although that's not that different from other places I've lived. I went to high school in Houston, and almost none of my friends there were born in Texas.

It's pretty common to see mobility scooters in the bike lanes there, as one way it helps (some) disabled people. When there's a well maintained bike lane, it's a smoother and faster ride than navigating sidewalks.

Some parts of DC are short on grocery stores, but I agree there are a lot in general. Depending on what you count as a grocery store (do smaller stores like Streets Market count?), I think there might be 10 within a mile of Adams Morgan. Kind of nuts how many options there are.

I don't find a car necessary in downtown. I don't have a dog though.

I do a mixture of Amazon Fresh, Amazon subscription, and Target delivery for grocery staples. For last-minute or stuff where I want to pick it out there are enough walkable places (Oliva, Key Foods), which aren't cheap but fine if you're not stocking up. I guess you can walk to ShopRite too. Super Buy Rite has free local delivery for beer/wine/liquor and good prices.

A lot of it comes down to whether you want/need to be in suburban NJ frequently. Car rental is fine for a weekend trip now and then, but probably not if you're visiting your parents in Morristown every weekend. A lot of the people without cars have social lives more oriented around either JC itself, or JC+NYC.

This is incorrect.

Some versions of the National Electrical Code require GFCI, and some versions do not. Which one applies to a particular building in DC depends on the date of construction, date of most recent renovation, how many units the building has, and a few other factors. DC does not apply NEC updates retroactively by default.

For new construction, that's true. But DC generally does not apply building code updates retroactively to existing buildings (with a few exceptions). So to determine the code applicable to an older building is more complicated. It depends on when it was built, when it last had a major renovation, etc.