Check the voltage and amperage rating of those automotive connectors. A lot of automotive connectors are not rated for 120 VAC.
True, but I thought we were talking about tail light and running light wiring on RV's, not site wiring.
Either way, the point remains the same. There are 120V connectors that could similarly reduce failures, assembly time, and debug or reconfiguration time, if harnesses were built on harness boards with good connectors, rather than connecting pigtails with wire nuts in a system that's vibrating it's way up and down the highway for thousands of hours during its service life.
I spent the first several years of my career in robotics, designing and building custom assembler and test automation robots. Then I spent the last 15 years of the "working for the man" part of my career designing very large scale industrial amplifier systems. Both had
miles of wiring in each system, all assembled on pegged plywood boards called wiring boards, and fully-connectorized.
At both jobs, each of our system types were built at a rate of usually just 5 to 25 systems per year, so probably even lower volume than an RV manufacturer. Even so, connectorized pre-assembled harnesses were the way to go, to eliminate wiring errors, and to facilitate easy component change-out and repair, over the years the system would remain in service.