I wonder how it could be interesting to propose a system where duplicants get old. By doing that you fully use the concept of graves, you will have to manage your team by minding their ages : an example, a duplicant who got 100cycles is less faster than a young 20 cycles duplicant, and so on.
And eventually at the end, they died because of time ^^ , and then you also fully use the system of new duplicants coming, How many duplicants we rejected because we already have our full team operationnal.
What do you think about this ??