Valve thinks it's not necessary and it's still in the air if it really isn't.
They have bet on the behavioral analysis anti-cheat horse but it hasn't won any races yet.
Moreover, they've proven that it's certainty more difficult to get it working than regular old fuck-the-end-user anti cheat.
Lastly, don't assume that the success of the platform will persuade these companies. They were already firmly un-persuaded when the steam deck got popular. And really, I think the popularity of a platform depends on the support of these companies more than the support of these companies depends on the popularity of a platform.
They have bet on the behavioral analysis anti-cheat horse but it hasn't won any races yet.
Moreover, they've proven that it's certainty more difficult to get it working than regular old fuck-the-end-user anti cheat.
Lastly, don't assume that the success of the platform will persuade these companies. They were already firmly un-persuaded when the steam deck got popular. And really, I think the popularity of a platform depends on the support of these companies more than the support of these companies depends on the popularity of a platform.