While the announcement last week of the closure of a 40-year-old mall in Singapore’s Marina Bay district for redevelopment has caused an outpouring of sentiment among shoppers and tenants, experts say the prime real estate has to be updated into a mixed-use site to survive in the city state. Last Monday, property developer Singapore Land Group (SingLand) said in a statement that Marina Square, which was completed in 1986, would close on March 31 for a redevelopment that would include features...