My latest on Voce Nation:

The entire Twitter ecosystem is built for short updates. Longer posts would break how Tweetdeck, Hootsuite and other apps look. The workaround here would be a “Read more” link to expand a longer post but Twitter is mostly about scrolling through and seeing quick updates. And everything Twitter has done over the last couple years has been about bringing more information into the feed – Cards, auto-loading videos and photos, etc – not trying to hide content. This would go against everything Twitter has done to make consuming and engaging with content more of a lean-back experience.

Source: Rumor: Twitter Mulling Dropping 140 Character Limit « Voce Communications