I started an open-ended consensus feeler thread on Community yesterday but didn't drop a link here. Sorry about that, here it is: https://community.openstreetmap.org/t/uk-consensus-on-junction-circular-is-there-any/130196   It might be more productive to get this discussion out of change nags and onto there. Can we continue the discussion there?

I think there's an ambiguity in reality-vs.-wiki-vs.-database we need to address a bit more openly.

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I think the wiki text you cited on wiki:Tag:junction=roundabout needs fixing or removing[1], now that junction=circular exists. It contradicts the bit at the top of the same page that states:

> The tag junction=roundabout is used only on road intersections where traffic on the roundabout has right of way.
> That is, the roundabout itself should be ***free from all intersection controls including traffic signals, stop signs or stop markings, give-way (or yield) signs or give-way markings.***

(my highlighting)

It doesn't matter what we call a thing, it ought to converge to what the wiki page says for something this established[2]. And that's sadly contradictory in the current revision.

[1] the text you cite predates the junction=circular tag:

https://wiki.openstreetmap.org/w/index.php?title=Tag:junction%3Droundabout&diff=prev&oldid=872524

Me I think there should just be one junction=round_thing tag *and* some namespaced attributes to cover overall RoW. But that ship has sailed a long time ago.

[2] … although wiki page adjustments to approach reality and database content are valid too, and part of the process