Besides the two discussed in the linked article, there have been many other attempts to build systems where the OS and all the applications are written in a sin

Besides the two discussed in the linked article, there have been many other attempts to build systems where the OS and all the applications are written in a single language: https://github.com/jon-jacky/Piety/blob/master/doc/precursors.md https://github.com/jon-jacky/Piety/blob/master/doc/precursor...