EasyOS is designed from scratch to support containers. Any app can run in a container, in fact an entire desktop can run in a container. Container management is by a simple GUI, no messing around on the commandline. The container mechanism is named Easy Containers, and is designed from scratch (Docker, LXC, etc are not used). Easy Containers are extremely efficient, with almost no overhead -- the base size of each container is only several KB.
Very very fast
While using Easy, everything happens in RAM. App startup appears to be almost instantaneous, even very large apps such as LibreOfffice startup in the blink of an eye. Ditto when starting a container, blink of an eye. Depends on your PC of course!
No ISO!
ISO for optical media is a legacy format. Very few desktop PCs are sold these days, it is mostly laptops, and none of those have optical drives. Easy is provided as an image file that can be written to any Flash-stick of 4GB or greater (and will auto-grow to fill the drive). Or, the file can be opened up and directly installed to internal hard drive.
Roll-back, roll-forward
With Easy, you can take a snapshot, and later on roll-back to it. Then, you can roll-forward. This can work across version changes, kernel changes. This mechanism applies to the main filesystem as well as the containers.