I agree, like most things, it's contextual. Making a user wait for a ripple effect every button press is ridiculous. Mind you, that most certainly isn't part of

I agree, like most things, it's contextual. Making a user wait for a ripple effect every button press is ridiculous. Mind you, that most certainly isn't part of the Material Design spec. However, if I've performed a destructive action, that is perhaps only reversible temporarily, then I absolutely don't mind being briefly interrupted to see a "trash" animation.