Probably because they don't have the money, the guts, and/or strategic alliancesto convert the delivery of their content and digital rights management systems to a safer and more modern technology. Many broadcast companies also hang on to Silverlight, for the same reasons.
Oorspronkelijk geplaatst op Quora: Why does Comcast Xfinity still require Adobe Flash to stream in the browser in 2019, despite security risks?"