Every software package and SaaS provider always includes an explicit lack of warranty somewhere in their TOS - and if that means we’re just working off trust, we probably need to move to more ‘trust but verify’ instead of the current ‘fool me once, well just fool me as many times as you want because I won’t use something else anyway and you know it’ model we seem to be using now.

Can you point me to a documented instance where a warranty claim on a software product yielded a useful outcome for the claimant?

The only one I can remember was against Microsoft for forcing an upgrade to Windows 10, which wasn't (IIRC) a warranty claim but a bait-and-switch issue.