The issue with crushed blacks is an inherent problem with (W)OLEDs being used for grading when the black is not set to a sensible level. All (W)OLEDs have potential problems coming out of black, as they have a hysteresis issue that causes black to 'stick' before detail can be seen. To overcome this the black level needs to be lifted.
Additionally, as the proportion of home TVs that are WOLED based is approximately 2% of the market, grading for (W)OLED viewing makes little sense.
The amount of lift required depends on final delivery being SDR or HDR.
For SDR black should be around 0.03 nits.
For HDR the aim is to prevent the black hysteresis sticking issue, nominally 0.005 nits.
An issue that is relatively new is Wide Gamut displays vs. Standard Gamut, with Wide Gamut being a relatively new concept for home viewing.
Realistically, for TV/Broadcast applications, wide gamut is intrinsically linked to HDR and Rec2020, and so should not exist outside HDR imagery. Unfortunately, display devices that are not home TVs often abuse the use of wide gamut colourimetry, and can incorrectly display standard gamut imagery on a wide gamut display, without correctly restricting the display's gamut.
This gets yet worse as some manufacturers, such as Apple, have bastardised what are defined standards, making it very difficult to know what you are really looking at when not using a well calibrated mastering display. For example, Apple have their own version of P3. P3 is a standardised colour space that is well defined within the film & TV industry, but Apple have what they call 'displayP3' colour space, which incorrectly combines the P3 gamut with the encoding sRGB compound gamma - not even the correct display defined sRGB gamma, which is a power law 2.2 gamma.
This obviously causes major issues with broadcast material viewed on Apple wide gamut displays... and means they must NEVER be used to skew any grade to accommodate their bastardised colour space.
While Apple's displayP3 colour space is highlighted here, any non-broadcast device - be it an uncalibrated PC display, mobile phone or tablet, or laptop screen - should never be used as a reference for any grading work - NEVER.