One disadvantage of using raster pyramids is that they:

Using raster pyramids involves creating multiple layers of reduced-resolution versions of a raster dataset. The primary purpose of these pyramids is to improve the performance of rendering raster images at different scales without forcing the system to process the full-resolution data each time. However, a significant disadvantage of this approach is that it does require additional storage space. This is because each reduced-resolution level needs to be saved, which collectively can take up a considerable amount of disk space.

While raster pyramids indeed enhance the efficiency of handling large datasets, they simultaneously contribute to increased storage requirements. This aspect is particularly important in environments where storage capacity is limited or where managing data storage costs is a consideration.