On the LUS side it was because Airbus captains were making 125/hour for almost ten years, they lost their pensions, the JCBA ended the insanely intense east/west battle (if you weren't LUS pre-merger you will have no clue how big this was for them), and it wasn't a true section 6 so the pay wouldn't get better (it actually would have been less) if the JCBA was voted down.

The concessions you speak of were highly outnumbered by the above for the majority of LUS guys.

I get why the old LUS guys voted for the JCBA. I personally voted no but I hadn't been around long. The older guys had it really bad for a longtime.

I don't know the main reasons LAA guys voted for it.

But none of this really matters. We have the contract we have and we need to stop bickering and get ready for 2020.