[3pm]

Related concept is Datensparsamkeit: https://martinfowler.com/bliki/Datensparsamkeit.html

[internetter]

Also tangentially related: https://www.w3.org/2001/tag/doc/leastPower.html

[nedt]

The even better term is Datenenthaltsamkeit - data abstinence. Not just storing less, but really only storing something if there is no other option.