Which is better to use docker vs virtualenv?

Question

linux

There is a physical server on which Django applications are spinning. It all works through uWSGI + ngnix and each has its own virtualenv. In addition, the MySQL database is running on the server.
Now I began to think about transferring all this economy to a docker container. Respectively 1 - MySQL, 2 and 3 - Django applications The
question is: does this approach have any advantages over the current architecture?

Answer 1

Advantages in
itself 1) Complete isolation and resource limitation
2) Easy portability
3) Versioning
4) Easy to back up

Answer 2

Pure hipsterism. Cool, but nothing more.
PS I moved some of my work projects to MesOS and docker containers, I'm happy as an elephant, but I still don't understand why.