To be honest, they didn’t make it easy to find

Logic gates are hardware, not software

While WinRAR is pretty great, it has also had several severe security vulnerabilities over the years, including one last year:

https://en.wikipedia.org/wiki/WinRAR#Security

Which isn’t quite what you’d expect from “perfect” software

The 2021 release of Tex included several bug-fixes, so not quite 12 years:

https://tug.org/texmfbug/tuneup21bugs.html

See also the following list of potential bugs, that may be included in the planned 2029 release of Tex:

https://tug.org/texmfbug/newbug.html

That said, Tex is still an impressive piece of software