I may be wrong here, but I don't think there is any NoSQL database that is ACID compliant. You need transaction, probably a SQL like Postgres is a good idea. Although I have never used them, Postgres has hstore and JSONB, it gives you the flexibility of NoSQL.

I strongly feel that Elixir is the future of web apps. This particular combination of Pheonix+React+Redux+Postgres+Redis is THE best stack I can think of right now. Probably the one that I would have chosen as well. Awesome! :)

Here are some of the horrors of reactjs - The learning curve involved with it There is a lot of tooling and configuration required for getting a simple app running. What to use? Webpack or gulp/browserify? How to mix ES6? What is virtual dom and component lifecycles? JSX While its not really a horror but wrapping head around it and writing components is tricky and is not as simple as pure HTML and JS. It looks like you are mixing HTML and Javascript when working with JSX. Thats all, I can think of. Most of which is related to learning. I havn't encountered anything particularly bad in React so far in terms of a frustrating pattern or bad design. I am looking forward to other answers to this post. :)

I am inclined to say you should learn JavaScript first, it will give you the ability to build almost anything on web. Wordpress is moving to JS in near future, so that makes sure your skills will still be relevant in wordpress world. Regarding VR, it seems C# is the way to go. You can learn it once you are done with JS.

Python is purely Object Oriented whereas Scala is multi-paradigm(OO as well as functional). Depending on how you want to use it in future that should be one point to consider. Wrapping head around FP may take some time.

Js/Node is being decently used for IoT. There seems to be good communtiy support for it as well. Here are some nice tools and framworks in JS for IoT- JS Engine for IoT API-based IoT apps JS Robotics Framwork Build Arduino based devices NodeBots Johnny-Five is an amazing community to follow.

I have never used a Git GUI myself but I have heard good things about SourceTree .

Aurelia is a MV* framework. What do you guys think about uni-directional data flow ( Flux, redux etc.)?

Spot on! Imposter syndrome quite resonates with me.

Thanks for the answer @xirclebox.