Originally Posted by lost_in_translation

P.S., one interesting realisation I had recently after a few rare ET flights is that Group 0 only really matters if you pay the extra for CE given that is when the entire cabin is already Group 1 and so there is risk of all the overheads around your seat being full if you board at the end of Group 1. It’s exactly the reverse of what you would expect when paying the extra to upgrade in some ways.