Have you tried BOSL2? [1] Adds a lot to openscad, enough to keep me going at least. Fillets, chamfers, rounding, common parts, anchoring options, and it makes use of parent-child relationships between parts.
Not entirely perfect and some compromises, for example faceting isn't always consistent and hashtag highlighting doesn't seem quite right, but overall still it's good enough for me. The wiki on GitHub is pretty good, and with the source in hand I have had an easy time understanding what it does and tweaking it as needed.
For openscad itself, there are nightly builds with the new geometry engine, which too mostly works for me and is a huge speedup over the older CGAL engine. Renders that took minutes in CGAL now take seconds with the new engine. I like to take faceting through the roof for nicely rounded curves, but that kills CGAL apparently.
I see you still have to add a fudge number to stop the faces intersecting when doing a difference boolean. I'm afraid this is still strictly worse than Build123d or any other DSL than wraps OpenCascade.
Not entirely perfect and some compromises, for example faceting isn't always consistent and hashtag highlighting doesn't seem quite right, but overall still it's good enough for me. The wiki on GitHub is pretty good, and with the source in hand I have had an easy time understanding what it does and tweaking it as needed.
For openscad itself, there are nightly builds with the new geometry engine, which too mostly works for me and is a huge speedup over the older CGAL engine. Renders that took minutes in CGAL now take seconds with the new engine. I like to take faceting through the roof for nicely rounded curves, but that kills CGAL apparently.
[1] https://github.com/BelfrySCAD/BOSL2