That’s probably it.
and maybe some day we’ll find out that there’s something smaller inside quarks
I don’t think particle physicists in 2026 wake up in a cold sweat worried about preons. We are still taking measurements, but I don’t think theoreticians have any reason to invoke it – and IIRC its predictions have been outright contradicted experimentally.




As noted in the OP, “use by” and “best before” (etc.) dates are vastly different from each other. “Best before” is very often ad hoc like “a year from the date of manufacture”, but if you’re past a “use by” date on your perishable food, you should approach it skeptically.
Climate Town has a good video on it and why this system exists as it does.