IANAL but I'm pretty sure the authors of software are liable for damages to property their software might cause. Regardless of whether that is the case, legislation should be enacted to ensure this and make complaints/remuneration standard and easy to extract without the costs of taking a huge company to court.
I don't know. Out of curiosity I went to framework website, found the software license for their BIOS firmware and it says "Software distributed under the License is distributed AS IS basis, without WARRANTY OF ANY KIND..."
EU has a minimum warranty period (2 years?) on electrical goods. UK has Consumer Rights Act that amounts to a limited warranty for as long as a reasonable person would expect the item to last(!). These disclaimers are to specify that any language elsewhere that sounds like a warranty -- 'we take pride in our work and ensure every laptop meets exacting standards' -- has a silent addendum of 'not a warranty' so you can't actually win in court claiming "this didn't meet exacting standards" (ymmv).
Again, IANAL, but you can't disclaim certain liabilities.