EULAs and disclaimers would simply be reworded to protect the company.

Or the company could spin off a subsidiary with no assets, which would produce and licence the software to the parent company.

User education, better QA and timely security updates (for the inevitable mistakes) are what is really needed.

Or companies will stop producing software if a single mistake can easily bankrupt a company.

Your car should be totaled if you go above the speed limit. That's the only way to stop rash drivers from endangering the lives of others.