Posi-Lock Connectors: Fabulous or Fad?

I did, and even though they don’t technically crimp, I don’t see a big difference between them and crimp connectors. They rely on the forced contact of the wires alone. Looks like you could still pull the wires out, maybe? They are glorified wire nuts. I could see the joint failing over time, either through corrosion or simply the wires pulling apart.

I’ll still solder anything on my car rather than use these.