[bearcobra]

Defender is a good example of why we might not want regulators to decide product categories. To me it seems perfectly reasonable that an operating system would offer a malware protection feature. Just because a feature wasn't included in a previous version and an aftermarket offering was developed, shouldn't mean that a vendor can't improve the product by adding it in.

[rmrfstar]

The regulator wouldn't have to do anything more invasive than say, "Microsoft will charge its development cost or greater for any additional features that are currently offered commercially".

Yes, that would create some accounting overhead. But it's a small price to pay to keep Godzilla from eating the villagers' livestock.