S3d seemed to me not horrible at all!, I have been looking for a slicer with similar capabilities on sequential printing with 100% freedom on each model settings including temperatures, speed, etc. Had a looong discussion with Prusa and Cura people.
they asked me why I needed to change all these settings....
Anyway, superslicer is not at all capable to do such things so, whatever nice features it has: it is not by far meeting requirements for manufacturing of special parts in special ways.
In another thread, I noticed ideaMaker, and this one is just perfect! it can do all these manipulations in sequential without making restrictions on how to control the way you want to print.
S3d as such is obsolete, though I like their user interface a lot, but this sequential printing was the only reason for me to be still temped to buy S3d.
But that is of no need anymore.
IdeaMaker is very similar to S3d in certain ways... It looks like these people really think about 3D manufacturing requirements.