Why do the ratio of proppeler plane over jet engine seems to have change in Bucarest airport during the covid19 crisis? I live in a village very close to an (intl) airport: Bucharest "Henri Coanda" International Airport.
Now, due to lock-down caused by covid pandemic, I noticed - at least today when I spent most of the time outdoors - that all planes that flew over/around our location were propeller, none of them was a jet-plane.  

Companies that normally operate flights on this airport: KLM, WizzAir, Alitalia, Delta, Aegean, Air France, Tarom, etc.

The main types of aircraft that normally operate on this airport are: A318, ATR42/72, B737, etc. 

Do you have any idea why only propeller-planes these days?
I don't think it's a coincidence or just an impression, so I guess there must be some logical explanation.
I have no idea about Bucharest specifically, but at least in the US, many GA pilots are taking advantage of the significant reduction in airline traffic to fly into big airports they're normally not welcome at. And, for the most part, ATC is welcoming these GA flights because they're bored too.