@skunked nailed it and when you are doing 100s or 1000s of control wiring terminations like I have in the past those stripmasters or similar are the Bee's knees. I'd frequently use ferrules and ratcheting crimper but that doesn't have as much application in automotive wiring.
As far as soldering goes, a lot of people think that is the best connection and while it is a great electrical connection when done properly, it also weakens the conductor and makes it brittle which is a particular concern when subjected to vibration. As I understand, the aerospace industry does not use soldered connections for this very reason and God knows vehicles have enough vibrations of their own.