Integration with Skype Consumer is no longer under review, and officially planned.Christopher J Pola commented
Microsoft: we see inconsistent results with Chat/Instant Messages being delivered btwn Skype users and MS Teams users. Is this a real feature or should we ignore the central 'Chat' functionality. What is the best practice? What is the formal roadmap for the products and the Chat feature being shared btwn them?
This request is still on the backlog.