When I bought S3D, years ago, it was competing with Slic3r and it was absolutely better than any other slicer including CURA, this was the reason why I decided to burn $150. Peace of mind.
Things have changed, and IMO the best slicer now is PrusaSlicer.
It offers more funtionality than S3D, especially in the geometry domain with boolean operators that can help to solve complex issues like suppressing supports on hole while keeping them on close cavity, changing print fill to accomodate stressed parts and so on....
It offers more GCODE flexibility, at printer, filament and impression levels and you can post process in python, which is absolutely brilliant.
Last but not least, GUI is very simple, you can do sophisticated things with simple mouse clicks, and you can even see the GCODE in sync with layer movements, which I had always dreamed to see in S3D.
For all those reasons, I switched to PrusaSlicer 2.5.0 recently, and I do NOT envision using S3D anymore.
Maybe I will write a python code to move factory files to 3MF files or to read them in PS if I need to, but I don't think it's worth the time to develop it, despite reverse engineered factory file format could be somewhat trivial. I have already evaluated the effort to make factory files associatives with my favorite CAD software and this is quite reasonable. Abandoned the project due to S3D silence for nearly 3 years.
So, I have to say bye bye to you S3D, you did a good job guys looooong time ago, but honestly your time is over, and your dishonesty to let people think about a 5.0 while not producing anything else than vaporware with some consultant's help (you will recognize yourself) has achieved my conviction. Hope your OEM agreements will help you to survive but not at end user direct cost.
Last but not least.... PS is FREE, available on windows, mac and linux platforms, not on M1 at the moment but since it is open source, should be done as far as M1 is becoming more and more popular.