How reliable AFDD switches are? (fire protection switches)
In my opinion AFCI / AFDD are not nearly as good as they ought to be, but that's another matter.
I also do not know what codes would apply in your locale but in many, even if the AFDD reduces the hazard, it does not bring you up to code, leading to problems with insurance, sale of the house, etc.
But aside from those problems, I don't believe it's a sufficient remediation.  AFDDs are intended to detect the &quot;signature&quot; of arcing faults, that is, to recognize electrical activity in the circuit that indicates arcing is occurring.  With a bad screw terminal connection, you can get a high resistance non-arcing fault, where the connection will heat up and possibly start a fire, without ever causing an arc and without ever triggering an arc detecting device.