Yes, FOSS in GNU/Linux distros are still written mostly C/C++. And I don't think C/C++ is going anywhere soon. What I'm saying is, Go and Rust are very new, but

Yes, FOSS in GNU/Linux distros are still written mostly C/C++. And I don't think C/C++ is going anywhere soon. What I'm saying is, Go and Rust are very new, but gaining traction fast for new projects, despite their low penetration as of 2019. I can't say the same thing for any implementation of C#. The concerns outlined here are still valid for the FOSS community today: https://www.fsf.org/news/dont-depend-on-mono https://www.fsf.org/news/dont-depend-on-mono https://www.fsf.org/news/2009-07-mscp-mono https://www.fsf.org/news/2009-07-mscp-mono And these are serious concerns given the context of Microsoft's hostile campaigns against FOSS, and EEE tactics against all competitors. What Oracle did with Java after acquiring Sun (Oracle vs Google) only justified and strengthened these concerns. The way I look at it, it's a risk that is not worth taking, especially given the alternatives today.