sure: if you don’t need to share existing UE4 animations, you can simply work on a Mixamo-only pipeline. But this is not animation retargeting (as intended by UE4), you are working on different assets. This plugin instead helps when you need animation retargeting as intended by UE4: if you need to re-use existing Mixamo animations on an existing UE4 skeleton or if you need to re-use existing UE4 animations on an existing Mixamo skeleton. Simply that