https://www.cnet.com/news/twitter-gave-you-280-characters-and-your-tweets-got-shorter/

Still, people appear to be taking advantage of the increased room in some cases. Twitter said users write out "please" and "thank you" more often since the character limit doubled last year. Abbreviations are also used less. 

"We're seeing abbreviations such as 'gr8' (-36%), 'b4' (-13%), and 'sry' (-5%) decline in favor of proper words like 'great' (+32%), 'before' (+70%), and 'sorry' (+31%)," the company said.