I never flew SW, can you or someone explain what the problem is with unassigned seats (what makes it a zoo)? I've used long distance trains and buses and it has been fine.
If you believe paying paying extra fees for every little thing constitutes order over chaos, well then maybe you should fly another airline and pay their fees. Personally I prefer Southwest's up-front pricing model. I just tap the check-in button when it pops up on my phone and board ahead of everyone else, thus avoiding the so-called zoo of people at the back who haven't figured it out yet.
The first time I flew Southwest I immediately saw that boarding first gets you a better seat. So I asked them, how do you board first? And they told me. I boarded first from then on.
Especially for families you don’t want your kid sitting next to some random person because you missed a notification on an app and ended up boarding last when only middle seats are left
As somebody preferring to make use of that extra time in the airport, that sounds horrible.