Two technologies that I've had an on and off attempt to learn for the last couple years finally clicked into place this year:
Ansible -- I converted my dotfiles install bash script to use Ansible and to also install all my terminal dependencies. Then I started expanding on it to include my entire development box and to provision a bunch of vagrant boxes of different Linux distros so I could test the waters with something other than Ubuntu.
Docker -- Work's been using this now for over a year, and I was a bit of a hold out on it since Docker just seemed like another layer that Ansible + Vagrant was doing a fine job of handling. Once I really dug into how the configurations worked together and set up some of my side projects to use it, it's usefulness started to come together for me.
Otherwise, I keep trying to learn Rust but don't have any projects in mind that would fit with it. I also keep playing with React on the side but haven't gotten very far in my understanding of that ecosystem.
Re React: I totally missed that train but was forced to learn everything about ES6, Promises, React and Redux in one gig. Fortunately I had someone who showed me the ropes, otherwise I would have wasted lots of time. Still, I never really understood how things work until I made my own side-project. Don't give up, React is worth it!
Ansible -- I converted my dotfiles install bash script to use Ansible and to also install all my terminal dependencies. Then I started expanding on it to include my entire development box and to provision a bunch of vagrant boxes of different Linux distros so I could test the waters with something other than Ubuntu.
Docker -- Work's been using this now for over a year, and I was a bit of a hold out on it since Docker just seemed like another layer that Ansible + Vagrant was doing a fine job of handling. Once I really dug into how the configurations worked together and set up some of my side projects to use it, it's usefulness started to come together for me.
Otherwise, I keep trying to learn Rust but don't have any projects in mind that would fit with it. I also keep playing with React on the side but haven't gotten very far in my understanding of that ecosystem.