I disagree that it has "tons of issues" with 4K playback. The only issue I've come across is the incorrect frame rate. Others have mentioned incorrect HDR metadata. I wouldnt say that qualifies as "tons". And I suspect it will improve once they release the update for UHD menu support.Unless Dune can nail 4k playback (which their new 4k has tons of issues)
To each their own I guess. I got rid of my Shield and am very happy with 2 Dune Pro 4Ks running yaDIS. Much easier in my opinion.