Informative. Thank you sir!We sort of are... kind of... depending... metric. Some products come only in metric sizes. All pharmaceutical products are in metric sizes. Grocery items are pretty much all "soft metric" - have both lb/oz and metric listed on the labels.
But - we still use 2x4 lumber (in spite of it not having been 2" x 4" for decades), rulers are feet/inches although some have metric on one side, soda is liters for most bottles and oz on small cans, and other rather odd mixes/exceptions.
Yeah... the US was supposed to have gone metric by ~1981 but congress removed the time requirement and essentially said "Whatever..." so we now have this odd mix on everything. Lots of it comes down to how expensive it would be to have to convert everything, which includes "legacy" documents/products that are still in wide use. Based on product labeling I'd say it's coming. It's just taking a very, very, long time.