I have (luckily) yet to find anything that doesn't play on my Samsung 2550, which hasn't had an update for at least 2 years. On the other hand, I see where software players (like for PC) have required updates to play some new titles. I wish I understood how/why the "keys" seem to last longer on hardware based players, but I hope that doesn't change: I sure don't want to give up my 2550!
Yamaha RX-A2050 AVR (5.0.2)
(4) Polk Monitor 10B's (R/L F/R), (2) Polk Monitor 4's (TM), Polk CS300 center channel
Analog: B&O TX2 Turntable, Nakamichi Cassette Deck 1
Digital: Pioneer CLD-99 Elite LD, Panasonic DMP-UB900 UHD Blu-Ray
LG 65EF9500 4K OLED