Formite transmission is still on the table but also, we now know that aerosol is a way of catching it, maybe the most dominant way
Back in the early days, the emphasis was on formite transmission, door handles, wash hands, don't touch face etc. This isn't a criticism of that advice, because this is a new virus and science was still learning.
Any discussion on here back then about "airborne" was blocked by many posters with cries of "stop scare mongering", even with some threads being removed. Again kind of understandable, but some of those blocked or shouted down were posting reliable sources, of reputable scientists just starting to understand it. It turns out they were right
Supermarket have got to be a main source of infection. Think about it. Some of these places have low ceilings, no ventilation, thousands of people in and out all day long. All breathing in and out the same air. This is why it is so important to get in and out as quickly as possible and not browse and only shop for essentials
Look at the way measles is so infectious. I'm not saying covid is as infectious as measles, thankfully it isn't, nowhere near as, but measles can be caught by someone alone in a room, not touching anything, breathing the same air as someone infected who had left that room hours ago. A sobering thought