A while back, I noticed that the fonts in our Typekit subscription displayed poorly at many many sizes.
I mapped out font/weight combinations for the font Acumin Pro across 25 font-sizes and all 9 weights, and noticed that a shocking 41% of font/weight combinations had noticeable distortions, particularly around the characters a
, e
, s
.
The font Utopia Std also had distortions at multiple sizes, though not as many as Acumin Pro.
Both Acumin and Utopia were made by the Adobe Originals font foundry and can only, per their LICENSE, be served via Adobe Fonts (Typekit). As I continue to visit websites, fonts with artifacts around a
, e
, and s
stick out like a sore thumb and I take the time to inspect them. They're almost all by Adobe Originals, and every instance I've seen has been served with Adobe Fonts.