If you do this, your C code will run significantly slower than, say, Java, Go, or C#, because the compiler is unable to apply even the most basic optimizations (which it can do still in all those other languages).

So, at that point why even use C at all? Today, C is used where the overhead of a managed language is unacceptable. If you could just eat the performance cost, you'd probably already be using a managed language. There's not much desire for a variant of C with what would be at least a 10x slowdown in many workloads.