Having a friend who often operates their keyboard by the old stick between their teeth method, I'd like to see an analysis demonstrating that the breaking change improves accessibility. Particularly since the alternative posed in the thread is the chorded alt-left.
I imagine this friend could benefit from a keyboard with extra programmable buttons. Of course you can't expect that for all accessibility needs.
This is breaking a standard interface. One group of people upon whom it most likely places a burden are those who are likely to have other shit to deal with already. Google ain't mailing out special keyboards to everyone who might need them. I don't imagine you're stepping up to fill that need either.