Although, I do crimp the big cables, and don't solder them, I am a big fan of soldering over crimping. Crimping and soldering if done properly is very, very good IMO. I solder only all my inline splices of wiring, and very often will solder small connectors after crimping to reduce vibration failures. Soldering the big cables after crimping is really tough unless you have huge solder pot, as by the time you get hot enough for the solder to penetrate the joint, you have damaged the near insulation on the cable.
My experiences in industry with equipment and other manufacturing processes consistently pointed to crimping being significantly more prone to wire breakage due to vibration, when compared to soldering. When you look at how each works, it really does make sense, although with some exceptions. When I was still working, I often heard that crimping was better, but usually from sales guys, and rarely from the maintenance mechanics (unless they had just returned from a vendor seminar).
The crimp connectors that are a single crimp, like the big ones we are talking about, or the automotive types that have the "strain relief" plastic on them are the ones that are the most prone to having the wire break from bouncing. The crimped area ends pretty abruptly, so the there is a fairly high concentration of stress at that point with little flexibility. One a well done solder joint, the solder travels up the wires strands a ways and tends to rather slowly taper off in rigidity, giving a somewhat automatic strain relief.
IMO, all crimped wires need to be restrained very well from bouncing, especially the big ones, or they are at risk of failure.
Of course, there are exceptions, which work very well. In small wires, the double crimp style connectors are really nice. The put a good, non distorting crimp on the insulated barrel, and then put softer crimp on the strain relief, over the wire insulation. Of course, the require very specific crimpers to match the connectors, so are not used much outside of manufacturing facilities. A cruder version is available in big cable stuff, usually with a mechanical clamp on the wire and a double bolt setup to crimp the cable on top of insulation. Used a lot for cable repairs, and are very bulky.
In industry, as well as here and elsewhere, this one of the topics where there are very many different opinions.
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