Its never a bad idea to have a better C. despite having alternatives that somewhat work, usually C is just the only logical choice in certain domains, because i think a certain freedom to express things memory wise, which ofc have a lot of pitfalls, but are needed.

i'd say if you want to make such a language, build embedded or core OS code with it. things that do MMIO, DMA interactions, low level IO in kernel code or firmware (more embedded).

if you can solve it in that domain, everyone will love you forever.