I can't disagree with this point. Among altcoins ethereum is at least not a clone of bitcoin but a very complicated system with lots of opportunities for good programmers. If it would be able to deal with all the security problems (because the code is too complicated), ethereum could have become as good as bitcoin and maybe even better. Litecoin is still not dead and it is very alike with bitcoin, so probably it will be able to stay on the stage as well.