Remove all FontSize setting from the global style ?

[IOL0ol1]

Is your feature request related to a problem? Please describe

Setting FontSize in the global style will break the inheritance of FontSize, for example, if I set FontSize in Window, all child controls that do not set FontSize will automatically inherit the FontSize setting of Window, but now that FontSize has been set in the global style of many controls, then these controls will not be able to inherit the FontSize of Window.
So, why should font size be set in global styles?

Describe the solution you'd like

Remove all FontSize setting?

Describe alternatives you've considered

No response

Additional context

Correlation issues #887

[RichardD2]

The tricky part would be the styles which rely on specifying a larger or smaller font size than the default.

Ideally, there would be a simple way in WPF to specify a font size of, for example, 1.5 x (Window.FontSize). Unfortunately, as far as I can tell, there's no easy way to do that.

I ended up creating a markup extension to provide this behaviour; perhaps that might be useful here?

<Style x:Key="Heading" TargetType="{x:Type TextBlock}">
    <Setter Property="FontSize" Value="{nbs:WindowRelativeFontSize SizeMultiplier=1.5}" />
</Style>