(unprompted) Y'know it's funny you mention the way two completely different units of measurement are both called "ounces" because it brings up one of my biggest gripes with the imperial system which is that none of the units make any fucking sense, like why the fuck do we have cups, pints, and quarts when each of those is just two of the previous one, what's the utility of saying a "pint" instead of "two cups" or a "half-quart", hell even quarts are kinda weird because it's just a quarter gallon, why are we having separate units when you could just call one "four quarts" or the other a "quarter gallon", it's not as bad as a yard being three feet which is so useless that we don't even fucking use it to measure anything but a yardstick (who the hell says someone is "two yards" tall) but it's still pretty fucking egregious, overall having just liters and milliliters is a lot more intuitive not just because there's less to keep track of but also because the conversion is actually fucking intuitive, you just move the damn decimal point (and same goes for any other prefixes like gigaliters or if you wanna use cubic meters, sidenote having that connection to your length measuring system rules)
The only real advantage gallons have over liters is that gallons is a way sexier word, and I don't mean that in an abstract sense or that it sounds nice, I mean it in terms of literal eroticism and you dear reader can figure out what I mean by that
