It's a niche format but all I care about is that my favourite films are released before studios give up on it. Of my friends, only one has any 4k discs, and most of the others consider discs as clutter and are selling/giving them away. My wife and teenage son no longer care for them, happy to...
I'm an enthusiastic buyer of 4k discs, many but not all, are a reasonable increase in quality over blu ray. Overall more films are being released on 4k than I expected but fewer classic titles that I want, I guess due to cost and anticipated lower sales than contemporary sci-fi and horror...
Number one item on my UHD wishlist for a 4k release is North by Northwest, others are mainly large format films, including To Catch a Thief, High Society, Ice Station Zebra.