Re: no way
Have an upvote for being sensible.
Having worked in the airline/airport industry I know that availability of systems is the top priority.
At one big Airport served by both AA and US on the west coast, getting a baggage system outage (to apply patches) would need at least 2 weeks advance notice. Even a failover (on an active/passive setup) requires a lot of advance planning with the airport and terminal managers. The last thing they want is a Baggage system that does not work and with bags in places where humans would find it difficult to get to.
being 'conservative' is the name of the game.
Yes, using tools like Puppet can speed up things but TBH, that would be the least of my worries if I was running the operation.
Then there are two other big cans of worms sitting waiting to burst open and that is
1) Baggage systems are custom made for the terminal. That means the software is often very customised.
2) These airlines will more than likely have baggage systems from different vendors. Vendors are often very reluctant to make changes to the software that has been accepted into use.
Just saying that using Puppet saves 'n' hours is being very simplistic. The whole thing is far more complex that that and these people know it.