If you can assume the scene you're capturing is fairly static over time, you can sometimes sort of cheat physics a little bit (keeping space constant and leveraging time) by resampling areas multiple times from different perspectives and cleverly combining that data together

Problem is that most the interesting bits people want more data on are quite dynamic in space and time, not just time. Even when it's not you don't gain linear subsampling improvements and eventually get diminishing returns with such approaches.