It also shouldn't be seizure inducing, retina burning vomit of random colors over a page. A website should be readable with the least amount of mind power given to stuff other than the main content.

Look at the gmail redesign. The modernized it. Used cool new material design and other modern goodies. And yet there is a gmail redesign hate thread on HN every other day.

When I am reading or doing anything, I want to spend my focus and time on the content. Not on the side distractions that serve no purpose.