As my previous thread on my windscreen being clouted by a rather large stone.
Swmbo who doesn’t like the car, now is having “kittens” about me driving the car hood down. Supposedly I am putting my life at risk from bits off lorries stones blah blah blah.
Are you tall enough that part of your head is above the windscreen? If so then you are at a bit more risk with the hood down since penetration of the windscreen will remove some of the momentum of an impacting stone.
Is it a risk? I used to travel for business so lots of miles and on two occasions I had serious car damage from objects falling from trucks. One even, it removed both wheels on one side of the car - a large iron casting off a scrap lorry in front. If either had impacted at screen level they would literally have removed my head. So yes there is a risk as there is in everything.
I wish you the best with SWMBO. My wife is unnerved by the boat heeling to the wind and it does not matter how often I explain the simple physics of it all, she still is frightened. Some fears defy logic.
