If you use ansible and followed the recent developments, you might know that ansible 2.10 is quite a big release. Most of the modules were split into individual ansible collections. The project previously known as ansible is now called ansible classic and will be replaced by

Ansible-base will only containing the bare minimum to run ansible, e.g. the ansible executables ansible-playbook, ansible-galaxy, ansible-vault etc.

The biggest benefits in my opinion are:

Fortunately, ansible-base will have all the modules that were previously part on ansible as a dependency. This should guarantee that 2.9 playbooks also work in 2.10