I'm not finding exactly why that closed, and you're right about ADA. I heard a reasonable sounding explanation once that I'm forgetting.ADA doesn't apply retroactively to building that are already open, and there was an elevator available for use. Horizons was opened and closed sporadically over 2-3 years before it was closed permanently, so even if there was a sinkhole, that would have been a fairly cavalier approach to personnel and park attendee safety. Not sure I completely buy that rumor.
That being said DDLand, I think you and I are just going to have to agree to disagree. We have different perspectives of what goes on, and presumably still enjoy the parks regardless of our perspective on this issue. We can continue to look forward to whatever they are doing, and hopefully we will all be pleasantly surprised with their future plans.
The sinkhole was a real thing according to several sources.
You're right. We should just agree to disagree. With that said I don't think it's a strong grievance. Disney's history is just really limited on that front. Now if you wanted to argue the value has gone down then I can agree with you.
As an aside, MK has (had) one example. The skyway existed for long after closure with no replacement.