Old age isn’t so bad when you consider the alternative.

Maurice Chevalier (1888–1972) French singer, actor, entertainer

(Attributed)

Attributed in James B. Simpson, Contemporary Quotations (1964 ed.) (though not showing up in later editions), citing New York Times (1960-10-09). I could not find the reference in the Times online archives, and Respectfully Quoted: A Dictionary of Quotations (1989) treats it as "Unverified."

Quote Investigator finds evidence Chevalier used the line as of 1959, but finds evidence of anonymous / filler use of it or close variants as early as 1952. He tracks multiple references, including attributions to Chevalier.