I think it would be great if it’s possible to do the connection between the mainboard and the raspberry pi over wifi. I found a project like this GitHub - apollo80/wireless-klipper: Firmware for MKS Robin WiFi (esp8266) - organizing a klipper <-> wifi <-> mcu bridge.
This patch give an extra option in the make menuconfig and makes that the [MCU] accept “host” and “port” instead of “serial”.
today, more mainboards have the wifi module socket (example the btt octopus max ez).
btt has also his own wifi module.
i hope more people will be interest in the wireless connection.