So I have an LG OLED B7 — a 2017 model. I bought it on sale a couple of weeks before the 2018 models launched, so I got mine in early 2018.
It has served me well and is still satisfying to me. I maybe think it's a bit on the dim side at times, and I have noticed some tech reviewers (like Digital Trends) have started to admit that there's some black crush that occurs due to the way OLED tech works, which can in some games amplify the dimness. I also know there's an inherent dimness from brightness limiters to help prevent burn-in.
To be clear, I have not had burn-in at all on my OLED, and with how much I've used the TV over the years, it's no longer actually a concern for me when it comes to the way I use my TV. My gray uniformity is kinda outta whack now, even after doing pretty regular pixel refresher cycles, but I'm under the impression that this is just normal wear and tear of the pixels on an OLED that come with time. I've used the TV a minimum of 2000 hours since I got it, probably much more.
I've been very tempted by the number of features and updates I've seen roll out into specifically the LG OLED line of TVs since, but I have on occasion experienced dimness that feels just a bit too dark in some games, even after configuration attempts. My eyes have slowly adjusted since I bought this TV (coming from LED computer monitors that I'd used for over a decade), but as I start looking into the potential of already buying another TV to get HDMI 2.1, VRR, 120Hz, auto low latency mode, Filmmaker Mode, etc — I can't help but wonder if I might be better suited to giving up "pure black" from OLED for higher peak brightness on premium LED sets. It feels like tech reviewers and people with a strong eye for picture settings still generally prefer the OLED approach as an overall approach, but I feel like perhaps the ONE somewhat persistent issue I've had with my choice to go with OLED — bearing in mind that I am more of a gamer than any other type of media consumption on my TV — is that I often kinda dislike the dimness of my OLED. HDR still punches like crazy when I set it correctly (which still requires me to lean on other OLED owners' guides on a per-game basis more often than not) and I genuinely don't dislike OLED in general, I just realize I maybe don't have any experience at all with HDR-equipped LEDs, specifically more high-end ones like Samsung's QLED line.
I've kind of started to dabble in research since a few tech sources have started to examine the differences, and I'm kinda considering trying to get an HDMI 2.1, VRR, 120Hz, auto low latency mode equipped LED instead of another OLED... As I feel like giving up the pure pitch black display capabilities of OLED might be offset in my continuous wrestling with a sense of dimness on my current OLED. I also don't know how much better newer models of LG OLED's have gotten when it comes to handling the impression of dim picture.
And for reference, I am a night shift worker and often maintain my night shift sleep schedule on my days off when I use my TV — that is to say, I very often play in a dark room and not a bright one. I have experienced that a bright room setup DOES impact the impression of dimness somewhat significantly, though, but my general hours are at night with the lights off, so my ongoing dimness impressions are not a result of me playing in an overly bright room all the time.