Hehe, according to http://www.whatsmybrowser.org/ NickJS is Chrome 51 =)
Very cool stuff.

Can it wait till js processes, then push button, then wait for another js-driven view to appear and push another button?

Hello, what kind of JS process are you talking about ?
You can wait for visual elements or if you know the JS events, add an action thanks to evaluate (eventually use callback of evaluate when the event is triggered).
Hope you like it!

cool stuff but for your own safety you also shouldn't forget to include proxies while dealing with this :)

nick.newTab(async (tab) => {
// We'll load the URL using open
await tab.open("news.ycombinator.com")
// Careful! Here, we're not sure the page is fully loaded!