The way Microsoft and Skype missed their opportunity during the pandemic to maintain or even expand their lead in video conferencing, while allowing a complete unknown (outside of the corporate world, at least) like Zoom to become the dominant platform, should be studied in business schools. The term 'Skype' is so synonymous with video calling that, based on personal experience, it is still used in place of FaceTime…
Skype achieved perfection a year or two after the Microsoft acquisition. At that point they should have downsized the team and focused on maintenance. Instead, they kept releasing new versions, each new version being worse than the previous one.