Driver safety has to be of paramount importance whether it is car or track design.
Hence the disuse of the old Green Hell and the Imola Banking.
The driver cell needs to contain the whole of the man including the legs and feet.
Case in point when it doesn't, Alex Zanardi 2001.
Fans expect new innovations and teams pushing the envelope in terms of regulations and always look forward to seeing the new crop of cars for next season and what may have changed.
Most of the time it has been an increase of width or length to fit all that is required to operate at the top of their game.
Usually, we see tail wings shrink or expand to reduce or increase downforce and the amount of ground effect skirting around the cars is amazing if you have ever seen one up close.
I stook beside Schumacher's F2000 a few years ago and was amazed at the width and amount of skirting around the car that you do not see on TV as it is usually black carbon fibre and not very visable.