I am really surprised this didn't kick up

For those that say ‘What is he smoking Tony’ provides good information,, I want to know more about those spot welds that get work hardened after sub frame connectors are installed.
Walk me through the physics of how a spot weld, that is already harder than the surrounding material gets ‘work hardned’ by removing flex.

I wonder if maybe he's talking about metal fatigue from the flex. Since the spot welds are already harder....and they are.......good point........maybe he means they get metal fatigue from having to carry more load from the added connectors? I know......I'm reaching here but that's all I can think of.