Computers are a “luxury good” now?

Ones made by Apple? Definitely. There are other cheaper options.

The cheap ones have gone up in price even more as a %

In what world is the latest and greatest Apple product NOT a luxury good?

Yes, Apple iPad minis are luxury goods

If we remove the last year of AI-related storage/RAM cost increases, the rate of inflation is way lower if not flat.

The iPad is not the only device that has had price increases in the last year.