In Furo, I went ahead and set break-word on the entire content container inpradyunsg/furo@c8b51d0

That makes it so that no regular text/markup, including really long one-word titles don't trigger a rewrap by default, would have an overflow beyond that element.

Do you think it's worth adopting a similar model here?

Yes, that sounds better, would you like to update this PR or create a new one?

Updated, how does this look?