if-let-chains in 2024 edition

if-let-chains were stabilized a few days ago, I had read, re-read and try to understand what changed and I am really lost with the drop changes with "live shortly":

In edition 2024, drop order changes have been introduced to make if let temporaries be lived more shortly.

Ok, I am a little lost around this, and try to understand what are the changes, maybe somebody can illuminate my day and drop a little sample with what changed?