I think the need for programmers will always be there, but there might be a transition towards higher abstraction levels. This has actually always been happening: we started with much focus on assembly languages where we put in machine code, but nowadays a much less portion of programmers are involved in those and do stuff in python, java or whatever. It is not essential to know stuff about garbage collection when you are writing an application, because the compiler already does that for you.
Programmers are there to tell a computer what to do. That includes telling a computer how to construct its own commands accordingly. So, giving instructions to an AI is also programming.
It’s an convenient way to post about some trending topic, without creating a whole new community for something temporary. For example the eurovision sing festival, or some natural disaster that happened.
And on the other hand, it works for expressing some personal thoughts or memes without having to adhere to a specific topic. But with random strangers instead of only your facebook friends.
I think for these kind of needs, no other social media framework would comply better.