I continue to prefer car services
I haven't been able to keep up with this forum but I just heard about the taxi strike that went on for several days.
The link provided in the wiki above that directs you to the transportation section of "Wanted in Rome" has some recent articles on February's taxi strike - which was followed by a Public Transportation strike. (I'm posting with my phone otherwise I'd provide links here.)
All this to say, I continue to feel the most comfortable with using a car service for when I have to make a TATL flight out of FCO. And it's what I continue to recommend to family, friends and businesses associates.