I find this hard to believe: how? Are there no records?
Edit: apparently the identity is known, but the lawsuit was settled before a deposition was required. Also:
https://www.reddit.com/r/programming/comments/mzht1/comment/...
I think regulating UI changes in medical equipment (or in other devices that could potentially kill people) is very much justified: Even if the software is nominally working as intended, if some update made unexpected ui changes that end up confusing the operator, this could lead to dangerous situations just as well as if the software had a bug.
I agree that this would be overblown for ui in non-critical places, but I didn't have the impression there is any heavy-handed regulation in those areas (otherwise, I'd expect we'd see fewer dark patterns and other "ux" redesigns that are clearly for "engagement optimizing" and not to make any task easier for the user)
Could you give some examples of non-medical situations where regulation gets in the way of ui redesigns?
That is also how the first Ariane 5 crashed.