Klipper is definitely superior to the traditional way of generating firmware especially when you have a reasonably complex system (ie having a CAN connected toolhead controller or a multi-filament system with a lot of strides being made recently in getting IDEX printers working) BUT a lot of work needs to be done to make its setup more user friendly.
Along with that, products that take modified Klipper and try to customize it for a company (Creality Sonic Pad and BTT’s Pad7) hurt the progress of Klipper as they are hit and miss when it comes to allowing users to connect their own systems easily.
Personally, I think Klipper will become the dominant 3D printer firmware approach but don’t expect that to happen in the next year or so.