I think you'll find that the people who tend to like music that is soft, aimed at adults, and "contemporary" don't much care about when a song was recorded. They care about whether it sounds pleasing. I don't think adults are worried about checking their weekly hit parade lists to make sure they're hearing only newer songs. If someone like a good song by
Harry Connick, Jr. or
Michael Bublé, chances are that they'd also like a good song by
Jack Jones, and wouldn't care when it was recorded.
Remember, the term Soft Adult Contemporary is industry jargon. It's not something engraved in stone as some sort of magic formula for a successful radio station.
Now, if someone likes
this song, would they reject
this song just because it was recorded 20 years ago?