tl;dr [You know the story] Twitter is losing money and has difficulty making new users feel heard.

In reality, Twitter has what IBM wishes they had. A relational connection of group-thought for use in analytics. The #hashtag allows for similar interpretations of one general idea allowing for a more diverse understanding of concepts. AI-"Deeplearning" hasnt matured enough for Twitter to be fiscally viable.... yet.

The fact that the term 'hashtag' is now a part of people's everyday vocabulary is a testament to the indication of how successful Twitter has been and still is.