Bröther, wait until I tell you about gamut
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I keep a janky 10 year old display hooked up so I can drag my content over to it and see how bad it's going to look on everyone else's systems.
If you dig deep enough into the "best" way to map HDR values to a monitor (HDR or SDR), you'll eventually reach active discussions on the ACES forum, with new techniques and transforms posted constantly.