Adding support for zstd is a fine move. None of this should be interpreted like that first comment of being due to “xz having a smell” about it. That is FUD, and this same kind of situation could happen to countless projects.

In the bios of many thinkpads there are options about powering USB ports while the machine is suspended or powered off. I disable that, because I want battery life even when suspended. Also an option about some windows suspend or S3 suspend, I chose S3 suspend, but don’t have clear evidence this choice makes a difference.