[zelphirkalt]

When plain text is zipped, it is no longer plain text and as such it does not take advantage of all the things that can be done with simple text files, unless there is additional tooling, which again unzips the zipped files. This creates some friction of course. General tools do not bother with implementing a knowledge about every format on the planet, so those zips stay zips and are treated as bninary data by version control, which makes them not too useful.