It has no formal spec, changes too fast, depends on third party libraries that change faster than I can breath, and is controlled by a foundation that is controlled by big tech corps.
What could go wrong?
https://ferrous-systems.com/blog/ferrocene-25-11-0/
Lets not forget not having a formal spec apparently wasn't an issue for C, which only got standardized in 1989, and even K&R C only specified a subset of its behaviours, which is a reason why there is so much UB, and implementation specific behaviours with YOLO C, as the Fil-C author likes to call it.