Zeman, for example, claims that X laid off 60 percent of workers who were 50 or older and nearly three-quarters of those who were over 60, compared with 54 percent of employees younger than 50.
Just a reminder there’s no protection from being treated badly for being young, only for being old.
If you’re 35 and up for a promotion, it’s completely legal for your company to flat out say you’re not old enough. Or in this case twitter could have laid off 100% of under 35 year old employees and no one else.