Yes, recently (I mean in these years) lot of nice works have been done.
Coroutines have been added to the language by an Intel developer.
https://github.com/modula3/cm3/commit/7ba3c91f603696eb8fb009b61cb48a1b11248f16
I'm curious to know if they use opencm3 internally.
Jay Krell is doing some interesting refactoring, especially to the build
system (years ago it was hard to build it). They also added C, C++ and
LLVM backend and support for further architectures (e.g. RISCV).
I guess a complete changelog would be very long.
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Diego Sardina