Odin has a 100% focus on (low-level) systems programming, allowing the user a very high control over memory layout and memory allocations which many other languages do not express as easily.
If you have tried Zig and/or a C or C++ programming, you might really enjoy programming in Odin. Odin feels wonderful to use and has solved all of the issues that C had and more.
For me a C-replacement has to be a very simple and disciplined language, with 100% focus on low-level programming.
Nim is great though, I've used it to make some small tools/programs
Zig is also wonderful, hope to use it more once it's more stable