You'll certainly find far fewer operating stations in most areas "soon", but you are right that the stations themselves will likely stand as historic monuments

You'll certainly find far fewer operating stations in most areas "soon", but you are right that the stations themselves will likely stand as historic monuments of an earlier time far into the future under current US regulations, because dismantling/cleaning/repurposing them is extremely expensive. (I've got a couple old unused stations in my neighborhood already and watching the various ways they are reused, left to rot/wild, signed and resigned and signed again for sale/lease is an odd past time. I can't imagine what things are going to be feeling like when this is an even far more common phenomenon out in the suburbs and exurbs.)