I have the same panel and a similar experience. It is the best display that I've ever used.
I often accidentally turn the monitor off because my desktop is just a black background and so it appears to be off if there isn't something being displayed.
The HDR could possibly be brighter, but the OLED blacks are worth the diminished peak brightness (which is brighter than is comfortable in a dark room).
I have around 12,000 hours and I have some minor blue channel image retention in the crosshair area, it looks like a small bar across the center of the screen, but it is only noticeable if I'm displaying a pure blue color (like when I'm looking for image retention). In actual usage I don't notice it and the peak brightness is probably a little lower. I usually run at 60-80% brightness depending on room lighting conditions so I have a lot of overhead before I'd notice the loss of brightness.