Even with companies that genuinely mean well, the problem with this policy is that when there’s no definite number of Days That You Can Take, They Are Yours, many people get more uncomfortable taking time off, not less. If everyone gets ten days a year, then you don’t have to feel guilty taking ten days a year. With that limit removed, there’s suddenly no guideline. Is ten too many? Is twenty too many? How do you know? Can you trust your manager to say “Hey, the amount of time you’re taking is becoming a problem, slow down on that,” or will they grit their teeth and say nothing up until the day they fire you for it? There are a lot of dysfunctional workplaces out there.