I've wondered about this, killing the "company" never really seemed like that big of a deal, as the structure (both physical building/tool/systems and operationally) don't simply vanish. You still have the knowledge and skillsets in the population, and the supply chains still exist.

The real problem with these "too big to fail" entities is that the people pulling the levers that cause failures never have any consequences whatsoever.

Yeah, you'll always need banks, energy, transportation, defence etc - operational mechanisms for exchanging goods, building, buying etc will never go away or 'fail' - but their operational practices absolutely could and should change

I'm so sick of the wealth class abusing absolutely everything to guarantee themselves more money than they could ever spend.