When using the rounded corner option for Rectangle, would it be possible for the resulting arcs, when they are pulled ‘full’ (i.e. two corner arcs touch), to be created as a single arc, rather than two quadrants?
In the meantime, you can use SimplifyCrv after creation to get what you want.
Just to make sure, is this what you mean?
That the fillets would be seen as one arc not two if touching?
Yes, that’s it. In the case you’ve shown, you’d end up with two 180 degree arcs instead of four 90 degree.
I suppose, taking things to their ultimate conclusion, pulling the fillets to their maximum on a square should give you a circle.