No experience with polars, but I've had quite a positive experience with xarray. I still use pandas for tabular data, but anytime I have to deal with ND data,

No experience with polars, but I've had quite a positive experience with xarray. I still use pandas for tabular data, but anytime I have to deal with ND data, xarray is a lifesaver. No more dealing with raw, unlabeled 5-D numpy arrays, trying to remember which dimension is what.