Docker "incapsulates" everything, and it is a pain in the *** to interact with the containers. Also, it creates a lot of complexity, including fake network interfaces in several cases.
I spent the last three years developing a miriad of support scripts to EE, written a GUI for my customers; these scripts all rely on WP-CLI and EE commands to perform their tasks, including automatic plugin installation and setup beyond EE native capabilities.
Also, it is common that an EE server runs dozens of domains (my largest customer has 4 VPSs with ~350 WPs each), and I'm really scared about what Docker would do in such case.
I've said this several times before, but in such case repetition is worth: instead of a "new" EE I'd rather have up to date packages for Nginx, REDIS and so on. We don't need extra command line options as much as we need updated components to existing EE.