I do that too, except that Android e-inks are usually underpowered for anything except a reading software. Which would be fine with a minimal Linux, less so with a weird Java VM and a 100 subsystems.

The apps, yes, while the system sucks (battery).

Android is still a bad match for e-reader usecase and hardware but whatever.

Why search for a doctor’s appointment when Google has access to all your calendar events. Why search for a party invite when it reads all your emails. And why search for a specific photo of you and your loved ones to create an image, when it sees all your photos.

They try very hard to sell this as something positive and not the privacy invasive nightmare it is.