Delphi has now the ability to run its code and GUI's on multiple platforms. In a study Delphi had 70% of the speed of Microsoft visual c++ compiler. But Delphi's compiler is lightning fast, it is almost like python in that sense. Delphi also has an amazing RAD development package and is easy to learn and use. The downisde is that it is not open source and very expensive. So Nim gives more speed, is free and open source and has the metprogramming abilities that is hard to beat. Nim's biggest weakness IMHO is that it does not have easy to use RAD GUI builders for Windows, Mac OS, and iOS/Android. There is also very little marketing for Nim.
BTW I found this excellent talk where the speaker argues why certain programming languages are mainstream and others not [https://www.youtube.com/watch?v=QyJZzq0v7Z4](https://www.youtube.com/watch?v=QyJZzq0v7Z4)
