The iPod touch is officially dead, but which iPod models are obsolete?

Obsolete Apple products are devices that haven't been sold for seven years.
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Identify your iPod model - Apple Support

Troubleshoot Your iPod Classic, iPod Nano, iPod Shuffle, or iPod Touch

Has Apple Abandoned the iPod touch? - TidBITS

Death of iPod - End of an Era

A Visual History of the Apple iPod

After 21 years, Apple bids goodbye to its last iPod model

The iPod touch and 'iPod' brand are officially dead - 9to5Mac

Old iOS App Store games from my iPod touch 4th gen : r/gaming

Identify your iPod model - Apple Support