Interestingly, I was listening to the radio interview with Wardley earlier, and he mentions what constitutes as family-friendly has arguably shifted to be darker, with the rise of social media, what scares a 10-year-old now is very different, had Haunted House opened identical to as it was in 1992, it would be very differently to what it was back then. Rides aren't immune to the modern-day context in which other forms of media and art are consumed.
Nowadays, there are a lot of kids consuming content relating to video games such as Five Nights At Freddy's, the various creepypastas and scare stories pushed to extremities because social media meant a wider audience, whereas kids in the past just shared whatever they heard from word-of-mouth. It takes more to scare kids now as the Haunted House did back then...