These are the "sacrifices":
5 things rich people sacrifice to get rich
– Drive older vehicle (47%)
– Own a modest home (45%)
– Don’t travel as much as they’d prefer (42%)
– Tolerate high levels of work-related stress (40%)
– Work so much that it takes time away from their social life or family (27%)
I think it's kind of funny because I don't own a vehicle or a home. I guess I would travel more if I could have, but in RE I'll be able to travel more longer.
I like that the point here is that once we've become FI (I guess "rich" in their terminology) we don't have to tolerate any work-related stress and get to spend all time with friends and family that we want! :)