It all depends on what makes such things “worth it” for you.

There are not a lot of job openings requiring it right now. E.g. not a lot of money in it right now.

There are not a lot of open source projects built on it. Although this is quite quickly increasing as we speak. E.g. not a lot of open source ‘cred’ to get right now.

There’s nothing (functionality wise) that you can solve in this language which you can’t already solve using its natural “competitors”.

But… It is a language built on - in my opinion - great core values, with both a steady vision and direction. It’s currently the language which allows me to in the quickest manner build fast, reliable and resource-tight applications. I do hope it will gain traction being among the new generation of languages which moves us as an industry in a better direction than we currently are.

So in a more altruistic way: I think every developer which learns and understands that programming at its core is about managing a limited set of resources to fulfill greater goods, and not simply an exercise of juggling abstractions of unknown quantities until something usable-ish sticks, is a net gain. Thus in a self-fulfilling way this will make learning languages such as zig “worth it”.