[eropple]

Cost is part of it. If you look at bed-dropper printers (the Ender 5 or the Sovol SV05), there's just more metal involved. Metal is expensive. It's also heavy, so your shipping costs go up.

It's also a simpler set of kinematics for the system to deal with. Most 3D printers have pretty dumb microprocessors (value engineering!) at their core. CoreXY printers use two steppers to execute any movement, and that requires more calculations. Delta printers use three steppers to execute any movement, even.

More modern printers run Klipper, which offloads the kinematic calculations to a single-board computer, and that addresses a lot of the problems you run into. Klipper also helps with bedslinger kinematics too, though, as it has the headroom to do some forward-looking optimization. The current state of printers is pretty cool.