In fairness to Mozilla, Firefox and Thunderbird are platform agnostic. It’s not really for them to tell users what OS to use. It’d cause them more aggro than its worth from all the people who have differing opinions on what the best OS is or the best distro to use. It’s already a tightrope act keeping their users happy when they announce things like AI in the browser. I think they’re right to focus on their own areas of interest.