Even on the windows side you are better off with the 1st party defender features these days.
Enterprise use 3rd party AV for central orchestration and control. Theres no reason for this in consumer land.
The threat detection isn’t meaningfully better across any of them (aside from some being “astonishingly bad”) despite what vendors claim.
The best people to know how to protect your OS are the people that made it.
It was never much use to enterprise so never got wide adoption.
It relied on a lot of different hardware and drivers all working nicely together as both client and host, which is a lot more difficult than a WAP-client relationship in practice.
Companies make the stuff, if no one uses it, no market, no money for development or maintenance.