Has anyone who works for an "Unlimited time off" company ever tried to reduce their work week to a 4-day week or only a 5 hour work day + taking consistently 30

Has anyone who works for an "Unlimited time off" company ever tried to reduce their work week to a 4-day week or only a 5 hour work day + taking consistently 30 days off vacation during the year? That would be what I'd consider a true "we believe you are most productive when you take the time off you need" policy. I have been a 4-day work week employee for some years now and I've never been more productive in my job. Yet, I somehow get the feeling that "Unlimited time off" companies would very quickly make sure this is not possible when employees would actually test the policy.