One question: Why changing the PI3B? I have one and Domoticz (plus some other stuff I use like FTP/Samba for IP cams, my own services linked to domoticz...) does not load it a lot! PI3 was also 1st 64bit PI hardware and raspbian 64bit (based on Debian 11) is now available and 64bit arm domoticz ...

OK, that's a complete new subject for me. I have to study that. Thanks for the information.

I've been running Domoticz on a Raspberry Pi 3B for 4 years and would like to replace the hardware.
Is there an instruction for replacing the Raspberry Pi and moving Domoticz (including database)?