Vue.js. I use it exclusively for front end now and have ditched Angular 2/React all together. I even got it approved for use in the very large enterprise I work at (internal apps only of course, but we have a lot of those).

I also embraced messaging for good and was shocked at how easy NServiceBus makes everything regarding AMPQ.

I continued to celebrate .NET Core advancements and use it for all my server side programming.

I also dipped my feet in Scala and really like what I found .. Q1 of 2019 will be Scala heavy at work, then back to .NET Core.

E: Forget, every single project I have is set up in Azure Devops now for build/deployment. It's amazing.