Same site was implemented in IE some time ago, but they didn’t implement it in Windows 7 (which, as you pointed out has not yet been end of lifed). It’s still

Same site was implemented in IE some time ago, but they didn’t implement it in Windows 7 (which, as you pointed out has not yet been end of lifed). It’s still in support, and the function shouldn’t even care about the host OS, I think the lack of implementation was more likely completely intentional (on the level of ‘if Windows.version < 10 return true’) which is an absolute dick move.