I purchased NUC8i7BEH in March and installed and used Windows 10 Pro.
The BIOS has been updated to the latest version of BE0064.bio (BECFL357.86A.0064.2017.0213.1122) at the time of purchase.
However, Intel's HP has removed BE0064.bio, and the latest BIOS is now BE0051.bio. Why did this happen? Do I need to revert from BE0064.bio to BE0051.bio?
Answers to your questions regarding NUC8i7BEH BIOS can be found in this thread:
A new BIOS for NUC8ixBE (Bean Canyon series) is apparently in development/validation at Intel.
The later BIOS releases only affect NVME SSDs with a drive password set in the BIOS. This does not affect all SSDs so if you do not use this feature than you should be fine with the newer BIOS.