Stupid, OT questions as well, piggybacking on your image-
I've been ripping all of my UHD discs to my NAS backup. Plan is to stream to Nvidia Shield devices running Plex at the various TVs around the house, but possibly also to tablets in the future. As I've been ripping, I've been selecting both the (using your image above as an example) DTS-HD MA Surround 7.1 English and the DTS Surround 5.1 English audio tracks for every file (when Dolby, I've been selecting both the TrueHD and the core track underneath it).
1) Is that necessary? Or can I get away with just the DTS-HD MA Surround 7.1 and TrueHD tracks, leaving out the core tracks underneath?
2) For the 30+ movies I have already ripped, does it make sense to go back in with MKVToolNix and delete out the core track to save a little space, or would that screw me over when trying to stream to tablets (putting aside the fact that I may not be able to transcode these 4k files quickly enough for tablet viewing anyways)?
3) If I leave the core track in there for the rips I have already done, how do I ensure that the DTS-HD MA Surround 7.1/Atmos tracks are what play first, with the secondary track only playing if there is a compatibility issue with the playback device (since I'm not ripping menus etc)?