Importing satpy getting slower

As satpy becomes more complex, it is importing more and more libraries. This is becoming problematic for us as we're often running tens of thousands of very small python jobs that don't need many of satpy's features.
For example, according to python -X importtime -c "import satpy" it takes ~2.3 seconds to import the most recent version of satpy, of which ~0.3 seconds is importing rasterio. However, many of our scripts make no use of rasterio, so this import is unneeded.

Is there any way to alter the code structure so that imports are only made when needed? Could, for example, the rasterio imports be moved into the writer so they're only imported when save_dataset is called?

For reference, I ran some stats of how long importing satpy takes across three versions (the older two chosen at random, tbh):
v0.18: 1.95 seconds
v0.25: 2.18 seconds
v0.36: 2.41 seconds

Start with python -X importtime -c "import satpy" and trace the imports responsible for the reported rasterio cost. Inspect the writer path around save_dataset to identify imports that can be deferred; done means unused features no longer load those libraries while the relevant save behavior still works and import timing improves.