Are people really using computers this old?

Given people still use legacy systems from the 80s and 90s: yes

the companies I worked at we never had machines older than 4 years old

Well good for you, that’s not the norm at all in my experience across multiple fields.

Oh yea and bring on the down votes.

Well when you assume that all the other people commenting their experience are lying about it for some reason it’s no surprise people aren’t gonna like what you said.