It is worse than you describe. Windows 10’s design language was a moving target, with acrylic (later replaced by mica in Windows 11) introduced in 2017, and a m

It is worse than you describe. Windows 10’s design language was a moving target, with acrylic (later replaced by mica in Windows 11) introduced in 2017, and a move to rounded elements coming out way before Windows 12 in ~2019 (or maybe 2018) with WinUI2. For much of Windows 10’s life, even the built-in apps like Maps were visibly inconsistent internally on things like corner rounding and hover effects.