Never noticed the little details in this before
My family watched this during our most recent Christmas season, (despite me not wanting to include it in our Christmas movies collection), and I was actually surprised at the little details I missed as a kid.
A fascinating one involves showing why people would blame "little gremlins" in malfunctioning machines, usually involving the inventions the dad in the family would make. According to what the mom said, dad's inventions would work for the first few weeks (and he'd let his family test them out at home), but then they'd start malfunctioning. (I asked my brother how they were able to afford that house if the dad kept making crappy inventions that didn't work and nobody sane would buy them. He told me in the novelization that only one of the dad's inventions ever worked, and he had a patent on it, allowing them to afford a middle-class house like that in upstate New York, which was pricey even in the 1980s).
Another interesting irony involved the guy with the snow plow. He apparently fought in WWII and kept complaining about how America had outsourced manufacturing of our gadgets and everything else overseas in exchange for crappier knock-offs, claiming that American-made products were still the best in the world. He then bragged about how, compared to his foreign-made cars, his snow plow, which had been built in an American factory, and never given him trouble, never had issues with "little gremlins" in the machinery. And guess which item the real gremlins use to attack him and his wife in his home later in the movie? The American-made snow plow!
I also thought the boy and girl in the story were high school age when I watched as a kid. Turns out they're not. They appear to be early 20s, probably either straight out of high school, or going to a local community college while earning money working at the bank.
Plus, I thought the young boy in the story was the main guy's little brother. He was actually the next-door neighbor whose dad sold Christmas trees.