[o11c]

getaddrinfo isn't its predecessors, there's nothing error-prone about it. The only thing that's nontrivial is falling back if the first server is unresponsive, and even there the obvious calling code is fine for almost all apps.

[kccqzy]

If you are using getaddrinfo directly, you likely wouldn't bother to implement Happy Eyeballs, for example.

[o11c]

And for almost all programs, that doesn't matter in $CURRENTYEAR.