Typically with open source stuff, a LOT of people take a look at the code. And a LOT of people will have suggestions that might be really good.
With closed source software, the eyes on it will be pretty much only the development team, which could be as few as one or two people. But even if it’s 20 or 50 people, it’s still fewer eyes reviewing the code than an open source project.
Also I’ve always suspected that telemetry is a huge vulnerability. Consumers tend not to like telemetry, while companies do. But with open source, it’s easy to remove all telemetry, and improve privacy and security.
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