One of the things I don't like about Nuendo is that I have to select the "correct" track type in order to do what I need to do. It's not a big deal but I really do love how in REAPER tracks are tracks and you can (for the most part) configure them to serve whatever purpose you need.
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In Nuendo, I have to create two "FX" tracks in order for the appropriate aux busses to be crated.
In REAPER, I create two tracks, and create the sends, that's it.