I understood #3: "Just don't make fire rings anywhere because nobody knows anymore. Even the archaeologists aren't sure where the old ones came from."

Besides, we're down to like, what, 4 days a year where the fire risk is low enough? Bring a camp stove and a LED candle :)

Pretty much this for much of the US.

Fire risk is just too high, even if rings exist. Use a camp stove. If you really want a fire pit, go to a non-dispersed/non-backcountry campground that has nice large fire pits in cleared areas (still not zero risk, but less risk than some of the janky small rings I’ve come across).