Just because it’s “unlimited” doesn’t mean there aren’t functionally consequences for using it. Actually using it will often be met with pushback or passive aggression in a way that limited PTO won’t (at least not as much). This could go on to more severe things like being denied promotions, being chronically talked to for low performance due to not being there, etc.
Typically the set point for acceptable performance will be when you take fewer hours than what other companies offer for PTO.
All this combined leads to people ultimately using less PTO than they do otherwise, this is why they do it. It’s not just in theory that the above could happen, it’s that it DOES happen
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