Why would you be depressed by what others do (or don't)? Doesn't stop you making your own choices, and HDR seems to be here to stay.
Agreed, HDR is here to stay.
If you look back over the past few decades, any advancement that offers a genuine, tangeable improvement in picture quality and/or convenience has been accepted and stayed on the scene; everyone notices them without having to be familiar with the technicalities.
405 to 576 lines, colour etc were obvious upgrades. 16:9 aspect ratios offered a more natural viewing experience and wider field of view. Digital TV offered more choice, and the move away from CRTs enabled much larger screen sizes (although I'll take a good ol' Trinitron for retro gaming any day!)
High Definition drastically increased picture fidelity, and 4K basically became a necessity for the same reason when 55"+ displays became the norm.
3D, and to an extent, 8K, have fallen by the wayside because neither of them offer a worthwhile upgrade to the viewing experience for the average person on an average sized TV.
HDR offers a noticeable and easy upgrade in picture quality for everyone, even on smaller, cheaper sets. As such I'm sure it'll become the default standard eventually; it'll just take a little bit of time like the other tech we now take for granted.
I went into a branch of Hughes a few years back with my mum, who still doesn't know what 4K actually is. But when she spotted a 4K HDR TV on display even she said 'Oh my god, what's that? That's AMAZING!' 😂