Nitpick: From the PoV of the (public tech) employers, they typically look at compensation not including appreciation of the restricted stock. It's typically "base + bonus + new stock grant value" or sometimes "base + bonus + value of the restricted stock that vests this year, but using the value at GRANT time, not at VEST time".
More specifically as an employee, I think any incremental value from holding the stock is not compensation FROM the company, since the employee equally has to carry the risk of stock prices going down.
Of course, practically, one's cash flow in any given year is "base + bonus + actual value of the stock that vests in the given year" and can be vastly different from how the company does compensation planning. And this is also what determines income taxes (unless I'm bizarrely mistaken about how income taxes work in some jurisdictions).
Having been a manager at multiple public tech companies, I'll say that this has led to very many 'interesting' comp conversations and not everyone comprehends the distinctions here -- regardless of what's arguably more 'correct'.