At the same time, anything I do at that level is probably going to be the exact opposite of portable: it's going to be something I intend to be specific to the exact system I'm writing for (namely, it's meant to run on a specific version of a specific Linux distribution, and possibly even to specifics of the installation on that machine). While I'm not likely to take advantage of many bash-specific features just because anything I write in shell tends to be so simple as to not need them, I'd also be an idiot to eschew useful features like arrays just because they're bash extensions.
In my experience shell scripts are fine for starting (and restarting) various programs and daemons or as thin wrappers around other apps. Beyond that I don't see the point. There's nothing other languages won't do better.
I've seen many "small bash scripts" grow up to thousands of lines, adding features one by one. And then you have to maintain that mess that catches fire every time an unexpected condition occurs because error handling in shell scripts is a joke.
That's not to say I wouldn't use it... it's actually my preference, and I've used npm for stuff that isn't strictly even node, but ymmv.