Please don’t let that typo mislead you. ALL of my example screenshot above are using CORRECT word “adaptive”, I only misspelled it on my reproducing sample. I should have double checked!
Now onto discussing about “blend edge”, please try to use the correct word “adaptive” and use “custom device” with a resolution like 400x300, you should see some blurred glyphs even at max zoom level.
I hope you can agree some of the glyphs below doesn’t look as crisp as the others.