> Meaning, if the company's stock went up 2x after year 1, your salary has effectively doubled for years 2-4. If the stock went down -50% however, you just leave and get market salary somewhere else.
If you get 25k shares worth <$1.00 and, you won't double your salary even if the share price doubles. Not to mention that only 1/4 would be able to be exercised, and you have no liquidity to realize the gain.
The assumption in my comment is that your entire salary is in stock — otherwise, obviously you need to adjust accordingly. But only 1/4th of the stock being exercisable makes sense if you think of vesting like a monthly salary — each month, another 1/48th becomes exercisable. Even if you technically own the rest as well, it's more appropriate to think that you don't.