"Denoting or relating to software or hardware that has been superseded but is difficult to replace because of its wide use." [1] [1] https://www.lexico.com/en/

"Denoting or relating to software or hardware that has been superseded but is difficult to replace because of its wide use." [1] [1] https://www.lexico.com/en/definition/legacy https://www.lexico.com/en/definition/legacy