Time field as TYPE

I’ve seen that asana is able to create a “time” for “actual time”, something related to time tracking.
Is it that complex to allow us to use it for other fields?
I need a field to estimate workload, I can work with numbers but since you have the field what’s the point of not allowing all to use it?

I am not sure what your question refers to. Do you have access to the new time tracking custom field yet?

Yes I’ve access, and it’s a HH:MM field.
I would be lovely to have it despite using the built in time tracker. that is a Business Feature.
I’ve the trial, but i’m going to have pro account since I don’t need any of the business feature.
However, the time would be handy.