Microsoft's Skype has finally shut down, concluding its 22-year tenure as the once-dominant internet calling and messaging service.

Skype users bade farewell to the online communication service Monday, reminiscing about late-night calls with friends, long-distance dates and free catch-ups with far-flung family — along with pixelated faces and “Can you hear me?” moments. Microsoft, its owner, has shuttered the service to focus on its alternative calling service, Teams.

Salvatore Cantale, a professor of finance at INSEAD, a global business school, explained in 2013 that Microsoft paid "roughly ten times Skype's revenues in 2010 [and] around twice its recent valuation.