You can switch from APFS to APFS (Encrypted) by turning on FileVault later on.
I experienced file corruption issues and catastrophic installation failure when I was beta testing macOS High Sierra with APFS (Encrypted), even on the very last beta.
So I have opted to use non encrypted APFS for now. I might enable FileVault when Messages in the iCloud arrives in later beta.
You can switch from APFS to APFS (Encrypted) by turning on FileVault later on.
I experienced file corruption issues and catastrophic installation failure when I was beta testing macOS High Sierra with APFS (Encrypted), even on the very last beta.
So I have opted to use non encrypted APFS for now. I might enable FileVault when Messages in the iCloud arrives in later beta.
Yes you can, and you do not even have to restart once FileVault is done because it is not converting your drive over to CoreStorage since APFS supports native encryption.
So impressed with Apple engineers that you can upgrade your Mac and your file system can be changed without loosing any data... In all my years of partitioning and formating, have never seen that before