For people like me who have lots of mods in their mod packs, it can be a pain to constantly upgrade mods to the newest version when it comes out.
If there could be a way to instantly transfer the mods (from a version you are already playing) to the newest version, there would be less headaches when switching versions (I have experienced this a lot). In implementing this change, players will be able to play a lot more, and not need to make a big deal of changing versions and downloading mods again.
Of course it might not transfer all of the mods, as some mods need more time to develop, but it could be handy when getting at least a large amount of the mods in the newer mods folder.
To those of you who have believe this would be a good feature to implement into the launcher, react to this with a thumbs up, and a thought bubble if the idea still needs developing.
You can @quartz trench me if you have ideas to improve and refine this option. If this feature is already implemented somewhere, call me a brick and tell me how to do this.