@kravietz Ah, sorry, I was thinking about chamfers and not fillets (3d printing fillets is usually a bad idea, because something somewhere will exceed the maximum overhang angle). For extrusions you can easily get chamfers on the sides along the extrusion length, but getting them on all other edges was always a chore for me that left my list of groups hopelessly nonnavigable, so much that I started wondering whether it'd be better to use solvespace to design 2d shapes, export them as something like svg, and use something like libfive to do the 3d part.
@robryk
Not on that level of sophistication yet :) In Solvespace all complex shapes are produced by creating a simple 2D shape (circle), then extruding into a 3D one (cylinder), then doing the same in difference mode which produces the void space in a pipe. So filleted edges could be done by cutting a rectangular, rotated shape from the edge, but if you’re asking about doing this by default on all edges - which makes a lot of sense - I have no idea so far :(