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Yes, only a couple of cameras appear to so far be compatible with the UHS-II cards. Time will tell how that progresses.

Further to this, when Dpreview reviewed the D750 the writer was disappointed in how quickly the buffer filled when he used "an insanely fast XDSC card". In fact he used the SanDisk UHS II 280MB/s card thereby reducing the performance of the camera and so was getting significantly slower write times compared to the UHS I 95MB/s card he should have used.

http://www.dpreview.com/reviews/nikon-d750
 
I try to get my photos onto my phone/ipad/mac asap, so that I can then have them uploaded to iCloud. Once they're up in iCloud, I'm much less concerned about losing them and then go on my merry way :D
Unfortunately iCloud plans top out at 1 TB. ;)
 
I will admit, I have not yet lost images due to card failure. Just my own stupidity by formatting the card before I made sure I had downloaded the photos.

And there it is, I just jinxed myself.
 
Unfortunately iCloud plans top out at 1 TB. ;)

Yeah, I'll worry about it when I get there. Right now I'm at about 370GB of iCloud photos and videos. Need to at some point to go through and do a purge of the photos I don't want.
 
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