$array actually expands to every element in an array.

Very convenient. But ~every shell script is written in bash or POSIX(y) sh. When I need to write shell scripts I begin with busybox sh compability. If it turns out to be too complex, I'll convert to bash. This is because if I ever would publish the script it would have better changes to be accepted as a PR for example. Yes. Bash is a mess. I don't even like it that much. It's okay. But it's more standard then zsh. Although I've seen the tides turn on some occasions, like macOS.

Maybe some day I'll give zsh a second chance.