I've had my NUC8i7HVK working for several days now and have not experience any issues during the whole process.
I did consider updating the BIOS, but decided not to since I saw no added value for updating it.
I'm totally satisfied with my NUC so far and would recommend this NUC to others but
tell them don't mess with the BIOS updates unless there is a justifiable reason for doing to.
Glad your nuc is working fine. However, you may want to reconsider updating your bios.
https://downloadcenter.intel.com/download/28038/?product=126143 Download BIOS Update [HNKBLi70.86A]
Read the release notes from all bios updates after the version you have. There may be fixes, especially security fixes, that are important.