My God.. i1Display is extremely superior to the Spyder5..
I knew it was good, but the difference is surprising..
Basically, if the Panel is within 2000:1 contrast ratio, (typical of VA-panel), The spyder5 will work fine for everything.. IPS and TN are mostly in the 1000:1 range, so they're covered.
However, if the Panel is ~ 2000-5000:1 contrast ratio, the Spyder5 truly makes a mess of things on lower brightness settings.. It runs out of range, and you end up with way too much crushed blacks.
And OLED, the Spyder just can't do it right.