A good article indeed, i see that a lot of employees are confused about their stock options specially in emerging markets like India, where we have seen quite a few unicorns come up in last 3-5 years.

I also really like the advice about privately held companies, who want to remain private. Things get very tricky there and on top of that mostly no one understands what to do with the stock options.

Unless you are able to do a secondary sale of the stock options they dont carry any value and i don't think a lot of privately help companies allow that. Not to ignore the tax you have to pay when you want to buy stocks, even though you cannot sell it.