You are meant to give priority to the vehicles in the roundabouts. A stop sign forces a two-second pause over yielding. I’m not sure that’s a big hindrance, and

You are meant to give priority to the vehicles in the roundabouts. A stop sign forces a two-second pause over yielding. I’m not sure that’s a big hindrance, and given how drivers barely mark stops and ignore yield signs, that might be the only way to get drivers to actually look if it’s free before they go on the roundabout. The point is always to avoid frontal shocks by limiting intersecting paths and having instead merging lanes. Even with stop signs, those roundabouts do that.