With the rise of the gig economy, I suspect that the ADA will come under severe attack in the next few years. My guess is that most AirBnb apartments don't really have ADA compliant accomodations. For example, many second floor apartments only have stairs without elevators or wheelchair ramps. In addition, there have been some high profile cases such as Berkeley removing free, public lectures because of ADA violations
https://www.insidehighered.com/news/2017/03/06/u-california-...as well as the abuse by some of bringing companion animals onto airplanes.
With independent contractors making a large part of the work force, accommodating is harder for individuals than for companies, and so political momentum may build up for repeal of the various laws.