(as|) dead as a dodo

(of a person, animal, or plant) certainly not alive or in existence any longer

The idiom "dead as a dodo" is inspired by the dodo, a flightless bird that lived on the island of Mauritius but became extinct in the late 17th century due to human activities and the introduction of non-native species. The expression is used to signify something that is not just deceased but entirely and irrevocably extinct or obsolete, much like the dodo bird itself.

Look at the trees – the one that fell and got us and the other one beside it – were both due to come down, they were dead as dodos.
The technology from that era is as dead as a dodo now, with no practical use in today's world.
The company's outdated business model became as dead as a dodo in the face of changing consumer preferences.
The once-popular fashion trend from the 1980s is now dead as a dodo, never to return.
After the advent of digital photography, film cameras became dead as a dodo in the consumer market.

not as popular or interesting as before

The idiom "dead as a dodo" originated from the literal extinction of the dodo bird, a flightless bird native to Mauritius. The dodo bird became extinct in the 17th century due to hunting and the introduction of invasive species. The phrase is used metaphorically to describe something that is no longer popular, relevant, or interesting, emphasizing its decline in popularity or significance.

The once booming nightclub is now as dead as a dodo, with only a few patrons showing up on weekends.
Printed newspapers are gradually becoming as dead as a dodo in the digital age.
Vinyl records, while still cherished by some, are considered as dead as a dodo in the mainstream music industry.
The old-fashioned gaming console is as dead as a dodo compared to the latest gaming platforms.
Traditional landline telephones are viewed as dead as a dodo in the era of smartphones.