Recently I registered a .com address for a business. In the modern world (year 2018) why would I need to add and maintain the www. subdomain of my domain?

I'm mostly interested in benefits of the subdomain. Thinking if I should bother doing the www.EXAMPLE.com -> EXAMPLE.com redirection.

UPD: I am not asking about SEO, not asking personal opinions, not asking tech details. The linked "duplicate" question is very different to my question.