FWIW in the marine environment, which is worse by far on electrical connections and hardware, the ABYC standard is crimped connections only, no soldered ones. Crimped connections preserve flexibility, soldered ones do not. If the connection needs to be weathertight, you use heat shrink tubing, which some crimped connectors provide already fitted to the item.
Best marine ones are made by Ancor- not cheap, but very sturdy. Their wiring goods are also excellent. Marine spec wire is copper tinned on every strand, and the wire gauge at each spec is slightly larger than AWG. (auto spec)