Obsolescence (bs l s( )ns), noun;
The state, process, or condition of being or becoming obsolete.
Origin:
Obsolescence entered English in the 1820s from the Latin obsolescere meaning "to fall into disuse."
Quotes:
In the case of The Who, as Townshend observes, that meant exploring the genre's built-in obsolescence. At the start of the group's career, he notes, everyone believed that pop music was going through phases, none of which would last long.
?"Lambert & Stamp: The men who made The Who," BBC, May 15, 2015
"We'll give him a good trade-in on his old one, allowing for depreciation and obsolescence. What model has he got?
?"Philip K. Dick, "Foster, You're Dead," Star Science Fiction Stories, No. 3, 1955