I would imagine after all the social distancing, it would feel a bit awkward sitting next to a person that is not from the same household.
Just another thing we will have to re-acclimate when the restrictions are rescinded.
As for sharing a cart, while it's true there is airflow when the cart is moving, I would be hesitant share with a stranger or even a buddy for now. There are times when you are sitting and the cart is not moving. Without a divider, I would not share a cart just yet.
It was COVID-19 restriction.
Prior to COVID-19, they did have online tee time reservation. During COVID-19, they went to phone in only in order to have the tee time pre-paid at the time of making a tee time reservation. I think they were not set up to take payment online.