If you lose every material possession (including money) you had today, how long would it take to make it back?
If you stopped working today, how long can you live without earning an income (salary or ROI)
My own cheeky perspective on the whole CRUD conversation is that everything in computing is fundamentally RU.
That's from the law of conservation of energy.
For real, everyone needs to take one low-level computer architecture class. School or YouTube, seek knowledge.