What are the must have for a Frontend/Backend web javascript oriented developper in 2018 and is Fullstack js dev great?

i'm currently looking for work and try to specialies myself as a Javascript developper and I was wondering what are the technologies to focus on and what is no longer interesting also I'm wondering if specialies as Full stack JS is really a gold way like some says.

Frontend looks like to have two opponents called Angular and React. Angular is on the top on the scene and it's has both old angularjs version and angular 5 with typescript, not every companies are moving on the new versions. React looks like it's getting more famous everyday and I don't know which is the most promising for the future. While I can see people crying about the use of JQuery it looks like it's still used in combination with frontend frameworks.

While using these on frontend I don't know if backend frameworks like Expressjs is really needed, they already perform routing and server and db request can be used through Http requests right?

No SQL Database like Mongo DB looks interresting but not really used a lot in most of the companies where I still see the demand on PHP+SQL combo to manage server side requests. Wordpress is still used a lot and there's some argument about using all these language on server side which were used to front end or for software dev (C, python, javascript, Java,...)

So I can't really figure if getting to fullstack JS is a real plus for now or the future and if so what are the combo of tech to focus on.

Have you guys thoughts on this?