[soitlyobserty]

Looking back to the Italian GP I noticed that a few teams didn't run the shark fin aero configuration.

These teams are McLaren, Williams and Ferrari.

All the other teams did run use it.

I always thought that this kind of aero config, using the vertical airbox extension, gives more stability at high speeds and under heavy braking, thus I was a bit puzzled to see some teams not using it, especially given the track conditions.

What are you thinking about it? What was the logic behind not using this aero configuration by some of the teams?