It's still stuck in weird formats and monoliths. A lot of GUI-only stuff has been ported to the mega CLI, but it's still the weird Visual Studio format plus XML files that you cannot replace with a simple Makefile. You still can't just compile a bit of C# as-is, it must have the Solution, Project, Assembly etc. chain, the run-as-script feature is nice (lots of cheers when that was presented! even on the live stream), but it's specifically not designed to allow you to assemble a toolchain that works for what you need. There is only one and it has everything, no options.

The question, of course, becomes: when does that matter? For a lot of people who are in to .NET, they see that as a benefit. Look at Go through this lens, and it's similar; the go CLI is the compiler, linker, package manager etc. I suppose the biggest difference is that it doesn't prescribe solutions and projects and file formats to go with them, which enables you to put this in any existing CI, make or other system.