all of these project is great but we cant ignore that Zig is not enter phase where we can guarantee stable API compability
I think it speaks volumes that these projects chose to use it, and speak very highly of it, despite the fact that it's still pre 1.0.
seems like you missing a lot of comment on this tree
how about you goes to Zig github and check how progress of the language
it literally there and its still beta test and not fit for production let alone have mature ecosystem
it's completely feasible to stick to something that works for you, and only update/port/rewrite when it makes sense.
what matters is the overall cost.
I would expect fixing an application to an older version would be just fine, so long as you don't need newer language features. If newer language features are a requirement, I would expect that would drive refactoring or selecting a different implementation language entirely if refactoring would prove to be too onerous.