“Steel Magnolias,” Robert Harling’s 1987 comedy-drama that became widely known thanks to the star-studded 1989 film, has over the years been met by critics with praise, derision, and everything in between. While one critic said, “The writing is filled with clever, country-fried witticisms and hilarious one-liners,” another wrote, “The script is formulaic and not as funny as it ought to be.”