The deployment can be difficult to automate especially if you are attempting to inject application properties at runtime.
There are solutions out there,though documentation may not cover every use-case, especially if you are deploying to something like AWS or GCP (Not everyone can adopt Docker just yet).
The Hot-Upgrade is a great idea though you will have to do your research to integrate this with your Cloud Provider.
Overall I'm betting adoption will be niche, and primarily via Teams coming from Rails. Until a major cloud provider starts offering native support + the community grows to a sizable percentage, it will be slow to catch on.
There are solutions out there,though documentation may not cover every use-case, especially if you are deploying to something like AWS or GCP (Not everyone can adopt Docker just yet).
The Hot-Upgrade is a great idea though you will have to do your research to integrate this with your Cloud Provider.
Overall I'm betting adoption will be niche, and primarily via Teams coming from Rails. Until a major cloud provider starts offering native support + the community grows to a sizable percentage, it will be slow to catch on.