Two things have me thinking about death: Ray’s commentary on the unappealing nature of sentient, disposable objects, and Kabitzin’s review of Kishimoto’s latest round of killings. (SPOILER ALERT for both that article and this one.)
Jon: What if our appliances could talk? That would be great!
Garfield: No it wouldn’t. Every time a lightbulb burned out it would be like a death in the family.
This is largely what is wrong with the idea of sentient disposable objects – to wit, if they really are sentient, your characters have exactly two options: either love them and care for them and be heartbroken all the time, or be callous bastards. (Or, you know, psychotic satsujin angels. I was assuming they weren’t doing the killing themselves, but the world of anime is large.)