Review the "Breaking Changes" of release notes, and the number of discussions regarding removing API after a short (in the view of someone who works on said "systems code") period of deprecation.
> Besides, this is completely off topic in a Zig thread. From the FAQ: "Zig is not afraid to roll the major version number of the language if it improves simplicity, fixes poor design decisions, or adds a new feature which compromises backward compatibility."
And thus, it won't be used as a systems language.