I should add, one thing about metal necks… During the winters the one problem I had was when putting the guitar in say a trunk or back seat where it was in the cold. When going inside to a warmer location, the neck did what most other metals do; it would sweat — moisture would collect.
This isn’t exactly what one wants on the back of a guitar neck. The moisture made it sticky.
The lesson real quick was, carry it in the front seat closer to the heater.