What images are pre installed?
The file system of an E2 receiver can be fun to ponder. Looking through the Python files and making occasional changes to pee around. Learning that a new one is created after doing so.
With a full backup of a working and stable system. No harm, no foul.
Discovering bells and whistles here and there. Kind of diversifies watching people circling a rock and monotonic book readers mumbling stuff you'll never understand nor desire to. Right!