>>64151808
Would the Magniot Line have even stopped the Germans if they had opted to simply punch right through it rather than go through Belgium (again)? Say the United States abruptly threatened to declare war on Germany if they violated Belgian/Dutch neutrality, so Hitler decides that Case Yellow needs to be rewritten and they'll have to go through Maginot.
I realize it would have been a very bloody affair for the Germans, but given that the Stalin Line and the Molotov Line were both overrun in mere days and later the Atlantic Wall was successfully breached in a single day, I kinda have my doubts that Maginot would have faired all that much better.
Come to think of it, I can't think of a single instance where fixed fortifications actually succeeded in stopping an attacking mechanized army during a strategic level offensive. Even in Ukraine, the initial Russian advances were blunted more to overextension and local counter-attacks than any major Ukrainian fortifications.