When you have to work even when you're dead

So do grimreapers change or it has been the same one since the Dawn of time.

The latter

Damn you doing the same job for a really long time.

Yeah

Well, death is eternal, and thus is more like infinity than a number. And multiplying infinity by infinity is just infinity.
So Grimreaper x Grimreaper wound not equal Grimreaper². It would just equal ANOTHER Grimreaper.

So you getting any promotion?

No

Well that's unfair.

Life is unfair

But Death isn't. And he works for it. So at least he should be given a vacation.

I let lesser demons take over for me every now and again

Grimreaperᴳʳᶦᵐʳᵉᵃᵖᵉʳ

Then it's cool.

For seeing what happens if Death goes on vacation, consult some Terry Pratchett books :D

I am not saying that death goes on a vacation I am saying that the reaper should at least once in a century. Having his trusted minion do his job. And sure I will refer those books.

I take a decade-long break every millennium