> and the safety story for pedestrians and bike users with them is decidedly not great as well.

The what now? Seriously, what in the world are you talking about? Roundabouts are heaven. They physically force drivers to slow down when approaching or leaving them, creating a safe environment for pedestrians and cyclists.

For example, there's no such thing as "running a red light at full speed" at a roundabout, no speeding up to "make the light", etc.

For cyclists specifically, they're amazing, because they eliminate the deadly left-turns. Every turn is a right turn, which is super safe.