Lindy effect is very strong in the programming languages world.

Zig is a very interesting and well built language, but it is also niche, unstable and not offering radical improvements over C.

C, as the foundation of all modern kernels and system tools, among many other things, is extremely unlikely to go away soon.

Everything you do in Zig can be done almost in the same way in C or C++.

I would say the real value of Zig is in the standard library that is more modern and arguably better.