At every place I've worked there was an infinite amount of job to be done. If I were to take 4 months off I would do less of it than if I've taken 1 month.
So that just shifts the conversation from "how much vacation you have" to "what amount of work is considered enough". Which doesn't seem all that different to me, or at least it would not have been at any place I've worked at.
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.
What does it mean to "do your job"?
At every place I've worked there was an infinite amount of job to be done. If I were to take 4 months off I would do less of it than if I've taken 1 month.
So that just shifts the conversation from "how much vacation you have" to "what amount of work is considered enough". Which doesn't seem all that different to me, or at least it would not have been at any place I've worked at.