I don't think its a good thing. Many years ago you could list in back and fill out a paper JS pass on mainline or DCI, although mainline was slower to get unlimited "flowback". That was lower tech than what we have today but it worked far better and was easier for the gate agents too. All they had to do was stack the JS slips in order (they were very easy to put in order with a quick glance) and everyone who could get on got on.

You could even fill out a JS slip "if needed" where if you wanted to be nice to get another non revver on who couldn't JS and the plane was going to leave without the JS full you could volunteer to take it to help them out.

Now suddenly with all the tech (ikr) common and easy things like that are now scandalous. I've heard AA (I think, maybe its someone else) has a "dual listing" procedure that works well.