I can say the main reason I continue to use Simplify3D is accuracy. I'd be curious if anyone else has done a comparison. I read an article in 2019 that compared Cura, Simplify3D and Slic3r for dimensional accuracy. Simplify3D was the most accurate. For me accuracy is important for what I use it for but provably not a big deal for most people.
I read that link, and there are a number of issues with the "study".
Top line, I would run your own tests. There is going to be (if not already) a feature that other slicers have that S3D does not, so I'd validate now.
1) PLA brand/quality wasn't specified. Consistency can vary.
2) Diameter of the filament wasn't checked - BIG difference on accuracy
3) They only did one print per Slicer! To really validate this is the Slicer (and not the printer), they should have printed each part multiple times to show that the printer itself is capable of maintaining accuracy.
4) We're not sure how reliable the printer itself is. We'd either need to do #3 to validate the printer reproduction, or test with a higher quality printer.
All of this isn't to say you're wrong, but that I wouldn't use that paper as a source of truth. Most of us run hobby-grade printers, so it's very likely that the printer is to blame, not the Slicer (doing basic math).