We make new Proto3 daughter connection board for Raspberry Pi 4.
Finally, the Raspberry Pi Foundation has created SBS, suitable for robotics needs .
I2C bug was finally fixed https://www.advamation.com/knowhow/raspberrypi/rpi-i2c-bug.html
Two HDMI ports. That means connect two eyes-displays is much more easy now!
More serial INTERFACES! Fixed USB and Ethernet.

We have a lot of problems with various SBC:
1) Asus Tinker Board have a buggy HDMI that incorrectly read EDID from device and can't set non-standard resolution. We need non-standard resolution to connect two eyes-displays to one HDMI port.
2) Orange Pi have a buggy UARTs and freezes sometimes on high load.
All previous generation of RPi was awful. But the first tests showed that everything works fine in Rpi4!