go by the wayside

go the way of the dinosaurs

To go extinct or become obsolete; to fall out of common use or practic…

go out with the ark

To become obsolete.

go the way of the dodo

To go extinct or become obsolete or defunct; to fall out of common pra…

thing of the past

Something that has gone extinct or become obsolete.

behind the times

Out of date; old-fashioned; obsolete; outmoded; outdated.