Yes, you're absolutely correct. So the takeaway would be not to bring software patent litigation to Facebook's door flippantly. A thing I'm absolutely in favor of.

I can't believe I'm defending Facebook though. A company who's data-mining practices completely creep me out. I definitely try to reduce the reach of their tentacles into my life but in this case I see nothing to take issue with.

Nobody is denying this. The real problem actually is the other way around. If Facebook infringes on your IP, you still can't do anything about it..at the risk of losing patent cover.

Im really not sure how it can be worded to let legitimate lawsuits through. But that is the problem. Tomorrow if you build a new AI algorithm on caffe2, FB can pretty much use the whole code and you would be bound by the patent clauses.

The patent clause applies to all patents, not just software patents.

Surely it should also be emphasised that any competing products that happen to violate those patents would be off limits? The emphasis in most of these discussions is that you have to get off React, but it's likely you couldn't move to a direct competitor either.