Breaking the 72dpi myth: Blues of mobile/screen UID

I thought I should address this in my own simple way. So I will keep this as simple and concise as possible, without delving in to too much details.

Since the beginning of my career in digital design, I have always considered the 72 dpi as the standard medium for designing digital artwork/graphics. This mantra of 72 dpi is for digital and 300 dpi is for print was never really widely questioned and maybe out of procrastination or pure ignorance, I was never bothered about this in the kick off of my career and to ask the origin or science behind the 72dpi rule. Breaking the 72dpi myth: Blues of mobile/screen UID