I'll note that I _am_ also dubious of the lifespan / long term viability of these projects (easy come, easy go), and I agree that they're very rough / early stages right now. That being said, I'm not writing off their value either. I've played with all of them, and while they aren't bulletproof (I haven't managed to get Bevy to actually run with any of them), they are undeniably close to being viable.