It's also currently very beta. The management tools are currently CLI-only; it can't be used on a boot volume; it's case-sensitive (not case-preserving, but actual-for-real case-sensitive); it checksums metadata but not all file data.
Apple intends for it to be their whole-ecosystem file system (and it's already showing up in iOS - https://arstechnica.com/apple/2017/01/ios-10-3-will-be-apple...), and the rollout will be fun to keep an eye on.
Today, APFS is an interesting beta project and if you're an apple developer—especially one whose apps do more than casual manipulation of the file system—you should start getting your hands dirty with it. From an end-user perspective, getting proper support of snaps and clones will be a welcome relief, especially since it seems blindingly obvious that APFS snaps will replace Time Machine's current mess of links.
But yeah, it's beta. You can't use it in production yet (can't even boot off of it). Will need to wait until later this year to get a more mature version of it before it can be adequately benchmarked and evaluated in prod.