Add feature Concave fillet

[Arghus]

I want a feature to be added, the ability to make Concave fillets with the “chamfer/fillet” tool.
Instead of having to make a second cylinder, convex that cylinder and subtract the shape to make a Concave.

Attached you can find illustrations of what I am talking about.

Please add this and thank you.

[McD]

For these situations, I would draw the cross section (profile) of the bottom part, then revolve it.

[Istvan]