https://www.theregister.co.uk/2019/10/08/windows_insiders_dona_sarkar_leaving/

Windows Insiders celebrated five years of the programme with the sudden ejection of its boss, Dona Sarkar, to cloudy pastures new.

Sarkar oversaw the programme during some of the lowest points in the history of Windows quality, although to be fair the organisational issues that led to last year's catastrophic October 2018 Update were in place long before she was handed Gabe Aul's Big Red Button.