Don't forget that you have to deal with existing messages, which may be longer than 140, and may be truncated in your new views/layouts, making history unpredic

Don't forget that you have to deal with existing messages, which may be longer than 140, and may be truncated in your new views/layouts, making history unpredictable. Don't forget that you're going to want to add attribution to the SMS, so you really have less than 140 characters. Oh, and don't forget that you are going to drastically decrease the value of a percentage of your reviews, which would have previously been long, detailed, and useful. The complexity of any modern day advanced system makes even these tiny changes balloon. The worst part isn't even the expanded work, it's the inability to predict how long all the ripples will take to fix. The subtle bugs that got introduced by a "tiny cosmetic change" are more easily fixed in a web environment, but become pretty devastating when you have a slower release cycle, or someone gating your releases (like Apple).