I just looked at the "yes" and "no" voters. The "no" voters aren't stihl fans, not one of them has "stihl" in their user name. I think that they hate stihl in general.
I voted against the flippy caps and own 3 stihl's, 1 with the old screw style and 2 with the flippy caps. I will state again that I do not like the flippy. I have NEVER had any problem with the screw type caps and have NEVER needed a wrench to loosen one, NEVER had to replace one of the screw syle caps, (2 flippy's have broken so far), and have NEVER run gas or bar oil down my pant leg like I HAVE several times with the flippy's.
I bought 3 new saws this fall, none of them stihl, mainly because of the friggin stinkin lousy flippy caps. It is not a question of if they will break but when. Most likely at an inopertune time. Now if Stihl offered them as an OPTION, maybe there would be new stihl saws with screw style caps in my garage instead of the dolmar and makitas.
Just for reference, I complained to the dealer about the caps the last time I had to buy one. He said he gets LOTS of complaints about the flippy caps.