The fundamental problem of FOSS / FLOSS or whatever you want to call it isn't that it's locked in some eternal struggle with proprietary programmes or Javascript or what-have-you.

The fundamental problem is much simpler: It's simply a fact that most people don't give a shit about whether their software is free or not. They just want their machines to work, and be intuitive, and show them pretty animations while doing what they want them to do. In the average man's ideal computing paradise, nobody needs to read source code, because nobody wants to read source code: In the first place, if you actually have to look up lines of code to figure out what a programme is doing, as far as most of the world is concerned that means that the programmer dun goofed. Nobody has the time for that.

Free Software isn't dying out in spite of its high-minded ideals. It's dying out precisely because the ideals of RMS and the other FSF-advocates are exactly the opposite of what damn near everybody else on the planet wants. And as long as software developers don't realize that, FOSS will never be more than just a fringe resistance movement that will be at best regarded as eccentric and pointless.