ahhh the old days when the latest and greatest was E1000! Honestly it was so long ago that I cannot remember!
That said, some folks like to use it due to compatibility. It is recognized and installed by pretty much every distro, unlike vmxnet3 which requires VMTools drivers.
Spotting these treasures is easy:
get-vm | get-networkAdapter | Where { $_.Type -eq "E1000"}
Changing the nic is just as easy! Just add a bit to the original query
get-vm | get-networkAdapter | Where { $_.Type -eq "E1000"} | set-NetworkAdapter
-Type "vmxnet3" -NetworkName "Portgroup name"
And…Voila!