I am adding all my apps vertically to a stack group..probably about 50ish..
**Update....on my tablet, it starts to degrade at 35, over 60, it's pretty bad...if I then change margin to -15, so that they end up overlapping, it is perfectly crisp again..**
After about 35, the text gets slightly blurry to the point where it's not too readable on small text.
Top left of screenshot shows a small separate menu greyed out which is nice and crisp..text below it starting at "All apps (LL app drawer)" almost unreadable..it's the same font and size as top line "Profile"..
text from "All apps" down, is in a stack which is in root as it's animated.
*It has been like this for a long time, originally reported on G+ over a yr ago. :)