I personally think one aspect that doesn't get much attention is the matter of public education. At the arrival of the pandemic here in Germany the initial advice was to seriously implement hygiene rules: 1.) Wash hands thoroughly and often, 30 sec long, plenty of regular household brand hand soap, 2.) When coughing or sneezing, turn away from others and put your elbow in front of your face and 3.) Keep distance of minimum 1.5 meters and 4.) Limit contact with people outside your home environment wherever possible.
Assuming everyone followed this advice, at that particular moment we didn't need masks so much (most people were in lockdown anyway) and besides the fact that there were not enough medical masks to go around, there was more danger in using generic face coverings than not because the average Joe didn't know how to do so safely and the virus was not yet under any sort of control.
Around Mid-May, we had a different circumstance. The general public had taken the hygiene rules to heart and been in lockdown quite awhile and the sun came out - Spring sprang, the numbers went down (thanks to lots of cooperation from the general public) and that was when the public education effort went in to the next phase: To give official advice and instruction on how to properly handle face coverings in a way that they help instead of hinder.
Meanwhile everyone, even Grandparents, my mother, and some people's recalcitrant Uncles know how to use Skype and Zoom. We wash hands like surgeons, we can and do handle face coverings without making ourselves sick and I think, for a public education effort that started 5 months ago and was directed at 90 million people, that is simply huge. I try to remain wary of the impulse to judge what we did yesterday with what we know today.