Maybe someone wants to unite to build something bigger. We have awesome quality messaging, but it is nice to have voice/video. Also for voice/video it is good to have messaging too. Maybe someone building encrypted email provider? Or just email provider? Email and Messaging are good together. File sharing? Aero FS? We can integrate messaging in any service, and it can look like "chat heads" of Facebook. Imagine, from any task in Issue Tracker you can open conversation with an author of issue/comment? Nice! No one has done this yet.

"Actor" is named after Actor Model, where Actors are small valuable pieces of code that can integrate with other Actors of different kinds. The same idea can be for services, build deeply integrated experience of tools that we are using.

This is dreams, but i have not evidence that they can't be true.

Actually, anything! Scala developers can build some features to server (like good API, hubot integrations, etc...), iOS/Android/Web devs can improve applications.

Someone can try to translate platform to various languages.

But we need good quality, this is the main point. We don't want to be another opensource-based company that don't have resources to build good software and use small community opportunities to build something that at least works, we want quality. This is essential for messaging: speed, reliability and UI/UX.