The problem with comparing ADA laws and capacities outside of WDW is that once you go to WDW it's totally different then the regular world. WDW involves much more walking then most people do at home therefore people who would never dream of using a wheelchair/
ECV to go to the movies use a wheelchair/ECV at WDW. I'm not saying that people shouldn't be doing this, if you need a wheelchair/ECV please get one. However Disney needs to understand that wheelchair/ECV use will be
much higher at WDW then it is for normal places. I rarely run into another wheelchair/ECV user at my local movie theaters but at WDW all you have to do is turn around and you're bound to see a wheelchair/ECV user in sight. Disney should be planning wheelchair/ECV capacity based on the percentage of people who use wheelchairs/
ECVs at WDW and add a cushion for extra measure.