Comment 10 for bug 1808056

@p-pisati After discussing it with Steve and Dave, we have decided that we'd like to switch to compressed images by default in linux-raspi2. Yes, we might break some edge cases here, but in overall we only officially support our own raspi images which we will be making sure are still working correctly after this change.

That being said, this will require a bit of coordination. The biggest challenge of such a change is making sure our ubuntu-core arm64 images still work with the new kernel. We officially introduced the arm64 raspi arch with 18.04.2 for core, so we'd have to find a way to not 'brick' existing images in the field. With classic images it's quite trivial, as we just need to set the dependencies right, but for core - there are no 'snap dependencies' we can use.