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.