No offense, what horror stories? They landed 20 miles away and were provided transportation that they likely didnt use if they were a tourist going into city anyway...what is this United 232?
The "20 miles away" is really like 75 minutes away, when you factor in NYC Subway, Path trains, very slow people mover, etc. It's nothing like a plane that was bound for SFO that gets sent to OAK (which is pretty much a piece of cake, compared to the EWR/JFK situation).
I would feel foolish if I were a European vacationing in Manhattan, to go through a bunch of trouble to get to EWR on Path for my return flight back to Yurrup, only to find out that I have to backtrack on a bus (in the direction I came from) to JFK.
If I had a onward DY connection in ORY or BCN, I may miss it, because the JFK/TATL flight has to depart maybe an hour or two late, amid all the confusion.
WowAir does not have these poor operational problems, despite their tickets being (usually) cheaper and their growth also being at breakneck speeds. You just have to endure a sometimes short (though occasionally long-ish) connection at KEF.