Comment by lgunsch

Some of the other practices of CI are also important. Not explicitly mentioned by the article, but perhaps implied. CI is a lot more than just running tests on pull request. It's a whole suite of practices enabling teams to perform and ship better. Some of which include keeping branches short lived by merging back to main early and often. Keeping code ready for deployment at any time by using strategies like feature switches. This keeps the cost of shipping a feature as low as possible, avoiding issues like spending lots of time rebasing and merging long lived feature branches.