Disney does well with "family coasters" which don't have big drops or go crazy with inversions.The last thing they built was a coaster, and then they're building a Monsters coaster.
Coasters are popular, but they're not for everyone as evidenced by attendance at coaster heavy parks (Cedar Point, etc)
It's doing very well with the newer family coasters (SDD, TRON, GotG:CR) that are 'smooth' in that there's no jerking around. Kids love it. And seniors don't break a hip or get whiplash.
All of WDW's 'family coasters' have significant queues. Back in the old days of Genie+, SDD was the first LL attraction to fill each day.
Now that DHS is getting a third coaster, EP and DAK could each use a second.