Honestly, the use case with the least/worst options on Linux is CAD. Yes, FreeCAD is a thing but it's terrible and it's established userbase insists that actual modern CAD packages are unnecessary.
Apart from FreeCAD, there's a browser-based option that looks good, but most people won't use it because it forces everything designed on their service to be open-source.
Honestly, the use case with the least/worst options on Linux is CAD. Yes, FreeCAD is a thing but it's terrible and it's established userbase insists that actual modern CAD packages are unnecessary.
Apart from FreeCAD, there's a browser-based option that looks good, but most people won't use it because it forces everything designed on their service to be open-source.
There are a few more options like BRL-CAD, QCAD, and solvespace. And there are commercial options as well like BircsCAD.