Hello my old friend, you have fallen so far, ES6 is a must, service workers kinda came and went but there is a use case I guess to get thing off the main thread, Node mostly blows compared to PHP but people just f’ing love it, Git is a must, Grunt is long gone NPM Scripts is mostly king, PWAs, SPAs, etc. all depends on where you work and the UX they want, Angular is toast only .NET people love it at this point, SASS has won the CSS wars, React is super popular still but I give that another 2 years, VUE is climbing the charts, we use that in my group, and also we just started adopting Svelte into a project, I highly recommend taking a look at that, CSS Grid and Flexbox are the bomb.

Check out this video https://www.youtube.com/watch?time_continue=5&v=SBB1YtwODT0&feature=emb_title