Sony have changed remote control signals so little in the past thirty years that the remote from my 1992 Trinitron works on our 2016 Bravia, and my 1999 PocketStation Pocket PDA remote applet can control both of them
the Trinitron’s menu/back/up/down keys (allegedly a first held by that line of TVs) even work as the corresponding keys on the smart TV, though left and right keys hadn’t been invented yet