

I mean, but we pretty much do know? The difference between Linux and Windows / MacOS is Linux is open source and can be checked and audited by anyone. If an exploit exists, it will be visible publicly and just needs to be spotted by those knowledgeable enough. Windows and MacOS are more than likely audited too but by private companies under NDA, so then it’s left up to Microsoft or Apple to decide what exploits are fixed.
Ah yes, I think that was when a FOSS maintainer had to step down and handed it off to someone else if I remember right? See this XKCD for relevance. It’s pretty ridiculous how much we (and companies with billion dollar revenues) rely on the free work of others for such important systems. But yes, an important distinction to make is that certain Linux distributions may use code by others that is not open source and malicious without them realizing.