I currently have a 2014 13" rMBP. It does everything I need it to do. I'm considering a 2017 rMB because I carry my laptop to work with me every day now. I'm wondering, though, does that 1lb make a significant enough difference to justify switching to the rMB IYO (I realize the footprint of the rMB is also smaller)? I know it's somewhat subjective. If any of you made a similar change, was it a noticeable difference for you? Thanks!