Ironically, Cura for some of the same reasons you list: I think everything derived from Slic3r is a dumpster fire of UX. Yes, I see Cura has started to lag behind. Yes, the visualization is nowhere near as smooth. And yes, every time I try Prusa Slicer/Orca Slicer I come running back to Cura. I will say that Orca seems the one to look for, as it’s trying to improve the situation of the aforementioned dumpster fire…

It’s not helping that the Orca profile for my printer must be straight up made by a competing company, because it makes my old Ender 3 look like the fastest thing on earth, while the Cura one is pretty much flawless.

Oh, like rc crawlers inserts? Makes sense.