What is a notable con of containerization?

The notable con of containerization is that the effect of server failure impacts hosted environments. Containerization allows multiple containers to run on a single host operating system, which can lead to a situation where if that host experiences a failure, all the containers running on it will also be affected. This can result in service downtime for all applications and services running in those containers, making reliability and fault tolerance critical aspects to consider in architectural design.

In contrast, while storage space, application communication, and user suitability can be relevant considerations, they do not encapsulate the direct risk associated with server dependence that impacts the entire hosted environment. There are means to optimize storage for containers, applications can indeed be designed to communicate with one another, and containerization is frequently used in multi-user environments, making these other options less significant when identifying a notable downside of container technology.