Our scientific research system is built around the process of joining a lab, mastering the work there, and then leaving. There are very few long term research partnerships. The people who stay in place are the professors, who generally do not do the research work.
So you join a lab, produce a few terabytes of data a year, pull a few publishable nuggets out of that and then leave. I have a few backup hard drives that move around with me with what I consider my most important data, probably total 1/10 of the data I have taken. After a few years, this data is really unimportant to me as the labs I have left have done a good job of continuing the research and I have to spend my time and money on something else.
The original data is eventually overwritten by researchers a few "generations" removed from me and that's the end of it.