This also could count for S3D...
I purchased S3D in 2015, because there was no "nice" and "beginner friendly" open source slicer. But this changed
with the "no preview / no trial" policy s3d goes with ... I'm pretty sure I will not look at it
I'm slic3r user for years, moved to prusa fork some time back, then moved to that german fork with autolayerheight, then back to prusa and now to ps2 .. it always did bridging better than s3d, but what was the most important part for me were modifier meshes that are 10x easier to work with that s3d and are implemented better than s3d ... now they are hitting at the core of the s3d so I don't see the point of continuing with s3d .. but .. who knows .. we'll see
well let's be honest here, there are ppl that use the version of s3d that was out when they purchased it, and they never even upgraded, they don't come to forum, they don't monitor what else is out there, they just use s3d as is and they are happy .. I know ppl I convinced to purchase s3d that are still on 3.0 .. didn't even bother to go to 3.1 for the bugfixes.. they just don't care "it works for them" .. so there's always going to be a market for s3d, no matter how much they charge and what features they do (not) have .. as there will always be ppl like that .. so "you have to.." part just don't work, they don't have to do nothing.. and we have to understand that they don't have to do nothing (took me a while to accept that) ..