Developer environment/experience is vastly better in my opinion.
All of our dev environments are docker images. Setting up a machine for a developer is install source control, IDE & docker, then pull the latest dev image and they are done. Pre-docker it was several pages of documentation and tracking down various coworkers to make sure you installed&configured things correctly. While yes, scripts helped, people always forgot to update something in the script and didn't notice until someone needed to install the dev environment. The immutability forces people to actually update the dockerfiles with the new dependency/tool/config as that is the only way to do it.
All of our dev environments are docker images. Setting up a machine for a developer is install source control, IDE & docker, then pull the latest dev image and they are done. Pre-docker it was several pages of documentation and tracking down various coworkers to make sure you installed&configured things correctly. While yes, scripts helped, people always forgot to update something in the script and didn't notice until someone needed to install the dev environment. The immutability forces people to actually update the dockerfiles with the new dependency/tool/config as that is the only way to do it.