We already have Incrementals infrastructure for Jenkins core. I think we could start publishing these packages as Docker so that people can get access to changes quickly.
CC Jesse Glick Carlos Sanchez
Add support of Incrementals Repo for plugins.txt
You mean, picking the most recently deployed master version. We could, though I am not sure how much you gain by that if you are still getting plain plugin releases from the update center. Seems like it would be a poor subset of Evergreen.
Also created JENKINS-51335 then so that it would be a less poor subset