https://forums.motorola.com/posts/cda80927a1?commentId=982820#982820
Matt (Forums Manager)
posted September 16, 2015 by Matt (Forums Manager)ÜBERXprt (12,000+ points)
The new (2015) Moto X Pure is not a developer edition, so unlocking the bootloader does void the warranty. Sorry about the lack of clarity on this. We've been using this answer but I was double-checking it before posting.
There we go. At least now we know (but that kind of sucks).