Maybe you all are wealthy, have near infinite budgets, or you think something free can't be good, or something like that, but FreeCAD is relatively powerful, even for someone like me. Here's an AXA tool holder that I have modeled parametrically, so that I can change the toolholder bore. This is for a 1" bar, which isn't standard. I didn't bother to add in all the chamfers, but it is easy to do so. If I want to change the screws it is easy to do by simply changing a value in the spreadsheet. I don't always design this way, but it is sure handy when you do.
I also modeled a case for my home made ELS controller with FreeCAD. I imported my PCB design into FreeCAD and designed the box and its cover. Exported to stl in a few clicks and printed the case. Was an interesting design getting registration in 3 dimensions. The display had to fit through the bezel, the USB connector had to line up with the hole in the box, and of course all of the fasteners had to line up with everything. This was done at an assembly level in FreeCAD.
Also modeled the pieces for the ELS in FreeCAD. First modeled a basic mock up of the lathe and added bits and pieces. I wanted to make sure things would line up when it was all assembled. It does, thanks to this work. Used FreeCAD to design the motor brackets, and whatnot. I think it is a great tool.
And, you can use it to design tools, too. This is a circle cutter I designed and built.
I don't know, this tool seems to work ok for me.
Joko Engineering has done an engine cylinder head in this video using FreeCAD.