I am currently rewiring much of my home. It is a converted commercial space, built in the late 40's with additions done at least once per decade... so the place is veritable museum of the evolution of electrical practices (and plumbing and insulation, etc...).
Today I ran across something I've never seen before -- electrical splices made with solder instead of wire nuts! In my younger days I was an electronic hobbyist, so I know electronic connections are commonly made using solder... but I've never heard of it done on house wiring. These connections were then wrapped with some kind of resin impregnated tape, which is as hard as a rock. As you can imagine, it is truly a joy to work on these things...
Anyway, my question is this: Would these things pass an inspection today? As it is I will be replacing many of them to accomplish the job I am doing, but I wonder if I should seek out all of them and redo them in the interests of safety?