My Dad thinks they are silly, but in my opinion, arm warmers make a lot of sense in northern winter life. You don't want to commit to gloves, but you aren't quite warm enough...or maybe your cute jacket has those sweet bracelet sleeves that leave you wishing for the opera length gloves of the 1950s...or maybe you are enjoying the poncho thing happening now, but your wrists are chilly as a result.
These made me happy for the reasons already listed, and also because when I first tried this lace pattern a few years ago, it was too difficult and I gave up. Not this time. I mostly nailed it. Cheers to progress! Happy January!