In my opinion it seems that there isn't so much wrong with docker as with people wanting to chase the new thing. If you look at the majority of people proclaiming the impending death of docker you'll see that it's because they think a new service has replaced it, the new thing. I don't believe that docker is going anywhere simply because it is easy to use. I was looking at tutorials for kubernetes and couldn't figure it out even after the third pass. Docker I had up and running in a matter of minutes. There will always be something new for people to chase, and new is interesting. This is part of why web architecture is so fractured, people want to use the new thing whatever it may be. But there is something to be said for easy.