[forum456]

I am doing it because I attended online course abs became interested...its not for job or anything.

The data can be use later when I change model or add more data to the set and need to retrain.

when you change model or retrain, there is little to learn.
It is a repetitive process.
It is not worth to keep the big data.

even if your model has become better, it has no practical use since it does not add value to your job or your life.