Comment by hn_throwaway_99

> I expect Twitter likely has some data to support their move towards more complicated and longer tweets plus more features.

With regards to tweet length, they definitely do in the form of average tweet length based on different languages. Cant remember where they posted this data, but they found that in more "compact" languages (i.e. languages where you can put more meaning into fewer characters) almost all tweets were under the max length. For languages like English, though, a much higher percentage of tweets bumped up to the max length and then spilled into the next tweet. They basically then optimized the length so that, even when using less compact languages like English, the majority of ideas people wanted to share could fit in a single tweet.