An unlimited PTO policy sounds like it removes payroll from the time-off business entirely. No accrual rates, no balances, no carryover caps, no payout calculation when someone leaves. For the right workforce, and with the right wording, it does simplify a lot.
But "unlimited" does not take time off out of employment law. Final pay statutes, state paid sick leave laws, FMLA, state paid family leave programs and the FLSA salary basis rules all still apply, and several of them were ...