Re: "To the best of [your] knowledge"
but I always try to touch a metal surface before touching sensitive areas like a motherboard or DIMM, just in case.
Yes, if it's not something you are doing every day, all day, AND you understand what you are doing, you can be perfectly safe without using the proper and approved precautions :-)
"Funny thing though - it seemed like static electricity was WAY more of a thing when I was a kid. I remember getting some BIG shocks sometimes growing up, but I honestly can't remember the last time"
Nylon was still the new "wonder" material in the time period you are speaking of, I also lived through it. It wasn't unusual for underwear, trousers and shirts to have a nylon content if not actually 100% nylon. It wasn't just women's clothes. And plastic "patent leather" shoes.
Likewise, nylon carpets in the home and workplace.
Some of that still hasn't left us, even if it's not always nylon. Other man made static generating materials are available :-)