I have travelled a few times by air in the past 2 months and noticed the same thing along with fuller flights(good for the industry, and flight costs bad for social distancing). Hanging back and waiting is fine. In fact I am usually one of the last to board going back to prepandemic I was of the mindset why sit on the plane any longer than necessary. Deplaning is a bit different. If I am sitting near the front of the plane would I not be putting myself in greater proximity to more people? I rarely have checked luggage (short business stays) and have yet to travel out of country. Will be flying each of the next 3 weeks in Canada to different cities so will try and note the differences regionally.