You forgot to mention Klipper which is an amazin project and firmware.
as an RRF user I hope to see those features move over one day.
It's planned. I'm unsure if I like RRF or Klipper more, so kinda keep up with both.
input shaping allows one to get rid of mechanical resonances without re-engineering the motion system on a printer. It's pretty unique to klipper -- but it's one of those features that I suspect is brilliant enough to where the other groups who develop such software will probably follow-up with their own variations.
I've spoken to a few people on klipper who are inputing the variables for compensation in directly from an attached accelerometer on the printer frame. That'd be the way i'd want to go rather than taking a pair of calipers to the ringing artifacts on the print itself.