However, even being on a possibly company-critical project means little to value of one's equity, especially post-IPO. There's little to no rationality involve

However, even being on a possibly company-critical project means little to value of one's equity, especially post-IPO. There's little to no rationality involved in pricing of public shares, and nothing you do as individual contributor has any impact. Now, if you were a high level manager and could order a layoff...