to be fair, "what amount of work is considered enough" is still an issue with the traditional PTO setup. following the HR manual to a T is not sufficient to keep a job if you never finish anything. I do prefer the traditional accrual system as I feel it makes expectations more clear, and it slightly reduces the impact of the "did I get a reasonable manager" die roll.

also some people (like me) just don't take a ton of PTO. I look forward to cashing out the max accrual at my final salary whenever I end up switching jobs. unlimited PTO essentially penalizes people like this.