I mean, sometime along the way you’re going to have something that consumes the data (otherwise, why bother keeping it in the first place), and that something will have certain expectations about the way things are structured.

It will probably become a good idea then to have some clue as to what structure used to be at one point or the other, and for that you’d want to keep track as to what got added/removed and when.

If it’s a very early stage in the development, and you don’t expect any of the current data to survive to the final version, I guess that’s fine. But when you have an actual running product that has to keep running, dealing with the multiple versions of the data scheme is a pain, and dealing with the multiple untracked versions of the data scheme is a pain squared.