This. I was never fluent, but spoke decent enough Spanish to get by. I worked in a shop with a bunch of Mexicans for a bit. That plus highschool Spanish, I picked up a decent basic conversational understanding. Like I could watch Mexican tv and keep up. I moved, haven't used it in a decade. It's basically gone. I'm sure I could get it back with some study and immersion, but there are basically zero Spanish speakers where I'm at. It's just not worth the energy and time to maintain a second language in my head.