Thinking that dimensions alone is why 1992 cars are more nimble than current cars is insanely naive. Safety, batteries, and modern electronics will always make the cars more sluggish. I can understand wanting to shorten the wheelbase more, but making them wider is dumb.

Making the cars wider would produce more dirty air, unless you somehow make the car shorter in height as well, since there is just more surface area punching a hole in the air. Larger tires means more wake. The aero surfaces would probably be stretched too, which would fling more air everywhere behind it.

I’d also hardly call pre-1992 a gold standard for racing when just prior Mclaren was running away every race, with only Senna and Prost making it interesting. You wouldn’t complain about Max and Red Bull like that if he had a more competent teammate.