Must beg to differ. A properly soldered connection (no acid core solder, correct temp iron, proper tin/lead mix, etc) with propper strain relief (so the solder joint will not be subjected to mechanical loads) will provide the best electrical connection.... minimum impedance, corrosion resistance, reliability, etc. Soldering a car's wiring harness is not practical, economically feasible or even desirable (due to service issues). Can you imagine how long it would take to unsolder a headlight bulb to change it, LOL. That does not mean for retro-fitting work or special add-ons that soldering is inferior to crimping. Wire wrapping can provide some advantages, in some environments, but not automotive.