***Same is true in electronics*** The company she applied for work 60 years ago found 95% of candidates COULD NOT BE TAUGHT HOW TO SOLDER. The company was SYSTRAN DONNER. Soldering is an art form few learn to master.
Just because someone or something decides to prohibit soldering it isn't because soldering is inferior, it's because there are too many butchers will try to fake a good connection. Don't give me the "vibration krap" I had to jump through hoops with the FAA PMA approval to be certified as an approved PMA electrical rebuilding facility. Where dozens upon dozens of connections are mounted directly to aircraft motors that shake worse than a paint mixing machine. How do you explain THAT? And these alternators and starters are run of the mill Ford, Prestolite, etc items. Stainless steel safety wiring makes sense. But an alternator fitted to a Lycoming has the same fasteners and technique inside, as a Ford Pinto.
That argument is as hollow as a rotten tree. Government? Make sense? Gimmee a break, people. "High altitude brushes?" For unpressurized aircraft? As far as soldering, better check assembly procedures for B2, B21, F35, F22 mil-spec. ??
The FAA had to STANDARDIZE the regulations for aircraft, it wisely chose to crimp instead of a wild-west multi allowance.
And the tens of thousands of failures due to solder glopping that I have seen in life-time warranty automotive products proved them right.
But to say crimping is SUPERIOR to soldering crosses the line -- it is absurd prima facia.