I can personally attest to the comment from BM saying the captain should email the crew which jacket to wear. He has said it to me.

He didn't think that RFOs and front end crews leave on totally different days. And that it's impractical to carry all 3 options, awaiting the captain's instructions. And that no one knows what the weather will be 10 days in advance. Or that some guys run hot (meaning light jacket ok), and some guys want the full parka because they do the walk around- and it rains. And snows. And gets windy.

BM was also the third SCP in a row that sent out a crew-wide missive that no one should have a Roller bag if they park in the out and back lot. Cause trips never get revised. Planes never break. And it's easy to carry all your crap on your shoulders than roll it on top of a mostly empty roller bag.