What if Baymax was left in destroy mode for eternity though? What if Baymax had refused to open his chip compartment for Honey like he did for Hiro? The crew would have no option but to leave Baymax blockaded in Krei’s half-demolished lab. Before he totally ran out of battery, he shut himself down and sat there for years undisturbed. Until years later a few kids go exploring through the creepy, old lab and Baymax reawakens. The now veteran crime fighting bh6 gang (well I guess bh5 now) have to shut Baymax down for good.
But Hiro wouldn’t be able to do it. It’s his fault that Baymax is like that and is doing the opposite of what he was programmed to do. And Baymax is the very last thing he’s got of his brother.