What are the ethics of using AI to imitate art styles?
I don't understand the question.
AI has no ethics, AI doesn't copy or steal, no more than a photocopy is stealing the pages of the books it copies. AI is not a person.
The persons writing the code of the AI to make it able to 'learn' (aka remix) from existing art and artists are the one stealing art and artists. As well as the user asking that AI to 'create' new art hoping to make some money out of it while knowing 100% that it's pure copying from other artists.
My spouse phone was bought on their store and it worked really well for years. The hardware wasn't that impressive but it was fine with her (don't ask me the exact model, I could not tell) which btw, show how much work e-os put in making their version of android run smoothly: it was really not a powerful phone and there never was any major issue for basic usage ;)
She was able to use the few apps she needed from their store, including banking apps and some 2FA/security one for work project.
Maybe my next phone will be from them too but they will have to wait for my p^resent iPhone to stop working as I refuse to buy a new one unless I have no choice anymore ;)