Late reply here, but almost the opposite - Although I do agree the problem can be visible on narrow streets too.
Here we have very wide streets, with no markings except the center lines (or center turn lane). There's unmarking parking along the curb, and the streets are still wide enough to offer tons of space between those and the regular driving area. On these streets, FSD will basically drive in the center of the ultrawide lane, looking very out of place. And when cars are parked there, it'll drive uncomfortable close to them when the streets are so wide a parked car could
normally fling their door open fearlessly without fear of being taken out. Unless a Tesla is around lol
Examples - in both of these scenarios FSD tries to keep itself centered when it really should instead try to keep itself within a standard distance of the center line. When parked cars are around it tends to weave back and forth, coming closer to the center, (while still hugging those cars) and then taking up more space again. And at lights, of course, sitting dead in the middle. I know it has always been like this, but it just feels worse to me with the last update or two.
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