I think you are assuming people hold onto the stock over those 10 years. Generally this is a terrible idea, as you are violating the core financial principle of

I think you are assuming people hold onto the stock over those 10 years. Generally this is a terrible idea, as you are violating the core financial principle of diversifying investments. I've seen multiple friends get burned by this approach when all their net worth is with their employer who then hits a problem. It's very risky and just looking at apple or google over the last ten years is survivorship bias.