OK, the problems with Raspberry pi supply chains did have me looking into this new competitor. Great reviews, good feedback, these guys at Radxa out of China are brilliant to have developed such a SBC.
I bought three 4SE boards, I got all three working ! But … not entirely. If I could pinpoint a single issue I would be asking for help, but I cant, as every time I started them up, a different problem occured. e.g. didnt reboot (required 5 to 6 tries with power plug reconnection). "sudo apt update sudo apt upgrade " failed so many times I could not count. HDMI connection, wifi connection worked, then it didnt, then it did, then it stopped altogether, requiring a new image flash of the uSD card.
I probably spent around 100 hours on all three boards before giving up. I thank you guys again at Radxa, but I would not be taking my consumer rights seriously if I didnt rate your product as “not ready for commercial use”.