Form the developer perspective, the big thing is that we don't have any dependencies, so updating compiler for us is just a small amount of work once in a while, and not your typical ecosystem-wide coordination problem. Otherwise, Zig's pretty much "finished" for our use-case, it more or less just works.
But, no. On the commercial side, I don't think we've had one conversation with a prospect or CTO or engineering team where they were concerned that we picked a systems language for the next thirty years. And while Zig is a beautiful, perfect replacement for C, I think the real reason the question has never come up, is that our customers come to us instead of us to them. We're not trying to convince anyone. They're already appreciating the extensive end-to-end testing we do on everything we ship.
However, I should emphasize again, that given all the assertions, fuzzing and DST we do, Zig's quality can't be overstated. It holds up.