We also have that in Michigan. You still see bottles and cans places. Historically, there have a lot of ‘reward programs’ that incentivised keeping bottle caps separate (either from the company or occasionally locally for reasons). I also distinctly remember it being advertised that bottle needed to be capless for recycling, so we always removed the caps and tossed them. Only recently have I seen verbiage on bottles requesting them to be recycled with caps on, which I usually forget to do because it’s habit to toss the caps.