In his presentations Antonopoulos said frequently that bitcoiners shouldn't worry about competition from altcoins because if an altcoin get some useful feature that gives its competitive advantage over bitcoin, bitcoin developers would just copy&paste this feature to the bitcoin code. It did make sense at the time.
However, I suspect that those times have gone. The whole agony of block size limit change shows that bitcoin code and bitcoin development infrastructure have already hardened and solidified to the point where any change, even as trivial, as block size limit, becomes difficult on the border of impossible. From now on we can assume that bitcoin code cannot be changed in any substantial way. No non-trivial feature, however important or competitive, cannot be added/modified anymore. Which means, chances of an altcoin replacing bitcoin becomes much more real. Which is bad news for everybody who invested in bitcoin heavily (financially, career-wise etc).
It's not trolling, I'm really concerned and I'll be happy if you can prove me wrong.
No doubt re no changes.
In addition:
1. NO "killer" apps (yet)
2. Endless blocksize debate. Sometimes it resembles the discussion on how many angels can dance on the needle's head.
3. A possibility that blockchains without tokens might be the next intermediate step before it will come back to a token-based non-bitcoin blockchain that would incorporate all learnings of the multitude of blockchains that many people would work on in the interim.
4. Lately, it is not really permission-less innovation-isn't it?
I wish i could be smart enough to figure out what might win and hedge a little, but ethereum is too esoteric, and monero is too small to bet a lot.