To answer the OP, I haven't noticed any change with drivers of motor vehicles behaviour. That there far fewer motors on the road has made cycling a more pleasant experience.
My location, North Herts.
Bludger makes a good argument for ending car use. Conversely, other have valid points too.
To argue that people employed in the car industry will lose their livelihoods whilst true, doesn't make it OK to keep producing them. (in some Central American countries tens of thousands of people are employed by the drugs trade, doesn't make it OK to let them carry on).
Most people want a greener society, fewer emissions etc. In conversion with people from different backgrounds I hear the same hypocritical arguments, of which I'm guilty of too.
That is, we nod sagely and agree that the humanity can't carry on consuming, and then book a foreign holiday, 4 engined jumbo jets consuming tens of tons of aviation fuel. (actually I've never flown). Or more innocently order cycle parts made from, iron, aluminium, plastic, rubber. All manufactured in factories and transported by motor vehicles.
We visit a relative in Surrey, occasionally driving on the M25 and inevitably strck in traffic near Heathrow. 6 lanes of traffic parked up in opposite directions, jumbo jets taking off every 40 seconds. It can't carry on much longer.
I wish I had the answers. The so called lock down has made society step back, pause a while. We must consume less.