I may have asked this before, some time ago, but I was wondering if - when a bag is refreshed, modified or otherwise altered or improved, is it announced anywhere? Is there a list of modifications that have been made to bags whose names haven't changed?
For example, I bought an Aeronaut a few years ago. Now there are the 2 types of Aeronaut, but I wonder if that means that the Aeronaut 45 is different than the one I bought before the smaller one came out, for example.
Is there any documentation of changes, etc. over time?