same with John Wayne, Humphrey Bogart, Cary Grant, Gary Cooper, Jimmy Stewart, Jack Nicholson, Clark Gable, Paul Newman, Spencer Tracy and Gene Hackman...sadly father time is undefeated!
Most of those guys you mentioned kept acting until they were very old,or died.
They didn’t stop because they were no longer romantic leading men.
.
Jack Nicholson made a movie twenty years ago with Helen Hunt as his love interest.
Yuck.