I spent a considerable portion of my career writing C. But for the past few years I write only Rust in my free time (I do write little snippets in other languages, including Odin, but nothing serious)
Debugger support is like any other tooling problem, you need somebody who agrees with you about what the tools ought to do - to do the work. In C there have been decades for somebody to put together the rudimentary pieces needed to debug C and that's hardly a tall order
In the specific case you cited (tagged unions) you need a better pretty printer and you need Odin to emit the debugging info so that the debugger can understand these types and the pretty printer can display them to you. Without that you're staring at raw data and no surprise it doesn't feel like C would be less useful.
I spent a considerable portion of my career writing C. But for the past few years I write only Rust in my free time (I do write little snippets in other languages, including Odin, but nothing serious)
Debugger support is like any other tooling problem, you need somebody who agrees with you about what the tools ought to do - to do the work. In C there have been decades for somebody to put together the rudimentary pieces needed to debug C and that's hardly a tall order
In the specific case you cited (tagged unions) you need a better pretty printer and you need Odin to emit the debugging info so that the debugger can understand these types and the pretty printer can display them to you. Without that you're staring at raw data and no surprise it doesn't feel like C would be less useful.