Early on, there was emphasis on how long the virus could stay viable on different surfaces, and there are other pathogens where surface transmission is important, so cleanliness in a medical or food facility is still important.
With more research, emphasis changed to ventilation and masking to reduce airborne transmission by droplets and aerosols.
Before the plague, I often attended a Shakesperean theater in Chicago with a thrust stage and strong stage lighting. When an actor delivered a strong speech (with those powerful Shakesperean insults), the saliva droplets flying meters away from his mouth were clearly visible in the lights. The theaters in Chicago intend to open sort-of normally again around October--I hope that the current surge of cases amongst the unvaccinated can be arrested.
I never really understood the rational for the emphasis on cleaning surfaces. Right from the beginning, it was evident it's a respiratory virus, like influenza, the common cold and the original SARS, which all spread through the air, rather than smallpox and polio, which transmit via surfaces. I can see why masks were controversial, because the virus is so small, but to me it makes sense to wear one, as the droplets the virus is attached to are relatively large. I think the authorities were worried about people buying up all the masks, leaving none for clinicians, hence why they advised against them
One important thing people need to do, if they wear a mask, make sure it's clean, otherwise it does increase the risk of other respiratory infections. Not enough emphasis has been placed on the need to regularly change the mask for a clean one. It's extremely important.
Unfortunately cases will quite likely increase in October, unless more people are vaccinated and even then, it will probably still happen, but it will be milder, in those who have had the jab.