CFF fonts appear emboldened on high-resolution displays due to stem darkening

Since Qt 5.9, Qt enables Freetype's "stem darkening" of CFF fonts (https://code.qt.io/cgit/qt/qtbase.git/tree/src/gui/text/freetype/qfontengine_ft.cpp#n151). This may improve rendering on low-resolution displays, but makes fonts appear emboldened on high-resolution displays. It should thus be enabled on low-resolution displays only in my opinion.

Normal rendering without stem darkening:

Artificial emboldening by Freetype's stem darkening:

The Freetype documentation also states that stem darkening is intended for low-resolution displays, see  https://www.freetype.org/freetype2/docs/reference/ft2-properties.html:

Stem darkening emboldens glyphs at smaller sizes to make them more readable on common low-DPI screens when using linear alpha blending and gamma correction, see FT_Render_Glyph.