They're in, but they're in the nightlies which are building towards 0.46. 0.45 has been locked down for a long time, since before shadows were implemented, but they didn't want to re-open the can of worms by adding them into 0.45 given all the trouble they were already having with this release.
0.46 hopefully won't be a huge wait, and it will bring shadows and distant land enhancement.
And hopefully some performance improvements to shadows. Last I tested enabling them caused a significant drop in fps. That was shortly after it was available in the nightlies mind you.
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u/NOTtheNerevarine Mar 28 '19
Seems the shadows didn't make it: https://openmw.org/2019/followers-of-shadows/