As has been expressed before, some of us need to stand up after sitting in an economy seat for a couple of hours. (We're also the people who you might see strolling down the aisle once in a while.)
But, most disembarking ime has been pretty orderly. Aisles get up at the bell, some pull their bags, some don't until their ready to move. But Aisle 8 doesn't go until Middle and Window 7 have gotten out, pulled their bags and moved forward. The exception is always those in middles and windows who aren't ready. Eye contact to make sure they know you're going to move past is standard.
Of course, every few flights have someone "special" on it. But, after all, it's a public conveyance. What do expect? Overall and in general, getting off the plane is uneventful and ordinary.