Mobile and static not aircraft tho;!. But apart from this solder wicking
effect which might cause a mech fail if the joint was pulled around
enough, don't seem to be any other failure mode does there?...


crimping soft solder is bad, because it has low elasticity. It ends up
progressively squashing under stress, getting loose and falling out.


Well yes but that depends how much solder there is in there...

the secret is to extend the support to the wire insulation upstream of
the joint in some way. Heatshrink, epoxy resin.... and if you must use
solder, use solder for the whole joint. Don't crimp soldered wire


--
Tony Sayer