@bearer thanks for your input!
There is only one serious issue refraining me from upgrading the firmware and it is my laziness. I know that for things to work, I will have to make changes on my config.g files and I have been delaying it because of laziness... Fortunately a friend of mine gave me (like as a gift) a damaged Duet which I was able to repair by just reflowing the ESP32 module, so now I have a Duet for these kind of tests...
Another thing is that my CNC runs with the Ooznest version of the firmware and I am somehow hesitant to change it. I guess that they just customized the Web Interface and not the firmware itself, but, well... I don't know