Window opening returns to 410ms
A change merged into quattro puts window opening back to 410ms, from 250ms where windows popped in too abruptly, and keeps the pop-in at 95%. The fade and every other animation stay unchanged.
The easeOutQuint curve stays. The motion comment notes window opening as the exception to the 250ms entrance rule.
David Heinemeier Hansson tried it live. He wrote that it feels calmer without looking slow.