Do you think that has gotten is outdated, a little strange? Apparently, the Brits do because you very rarely see it or hear it in Great Britain. But has gotten is alive and thriving in the U.S. because we recognize it does mean something other than has got.
Look at these two sentences:
- Amanda has got the required botany book.
- Amanda has gotten the required botany book.
The first sentence tells you Amanda possesses that book; she may have already owned it. It’s the same as saying she has the book.
The second sentence says Amanda has acquired the book; however she got it, she didn’t previously own it.