Cool, I have been trying to quit Facebook many times in the past but the bad habit always found its way back after a while. I might give it one more shot now.
Feature request: add comment so that people having the same goal can discuss on daily basic how to cope with the Facebook itch.
I tend to believe so. People have the most fear toward AI are ones who don't work on AI directly. I think it's quite possible that we will develop some really advanced AI in the future but it will take a lot longer than what these people expect. Andrew Ng thinks it will take hundreds of years, not years or decades for us to get there. In other words, I think there are better problems (clean energy, hunger, etc) to solve at this point.
Languages are tool to do things. So it all depends on what you want to achieve. For native iOS, MacOS apps, Swift is probably the best bet. For server code, there are many more good options. You can learn Swift and hope that it will have better support to write server code but if you need something now, learn something else.