Why are we so stuck to brick and mortar?

I understand why we have used brick and mortar testing for so many years - we had no viable alternatives. But now with innovations in technology it is so much better, secure, affordable etc. yet why do we stick to the past so zealously. I know change can be scary, but really. Paper-based testing in the 21st century for large scale assessements, certification, licensure, or even entrance exams... it does not have to be hard.