I think this is a more interesting topic than the article. The results of building flat companies is that employees don't have much room to move up. So it's a

I think this is a more interesting topic than the article. The results of building flat companies is that employees don't have much room to move up. So it's a much better career move to switch companies in order to get into a higher position. You learn a lot, and then a year later feel like your career is stagnating again and have no good opportunities to move up within the company you're in, so you jump again. I feel it's almost a bad career move to stick it out with the same company, because the tech companies I've worked at are so terrible and / or slow about promoting from within.