We are facing a new beta version for macOS High Sierra developers, the fifth version. In this case, as in previous versions, improvements are added to the stability and security of the system, in addition to the bug fixes that the previous version released by the guys from Cupertino may have.
Another featured topic in the previous version of macOS High Sierra beta released for developers, talks about fixing or solving the problem which appeared in the security of the WPA2 Wi-Fi standard, thanks to which many modern Wi-Fi networks are protected and that it was compromised.
MacOS High Sierra beta 5 does not seem to add any major changes on this "KRAK" issue. but if it is true that it arrives very early, from what we see how Apple seems to be "forcing the machine" to launch a final version as soon as possible. In principle, this final version should arrive during the next month, but only Apple knows this.
In any case what we are seeing is that no talk of solutions to the APFS file system and we hope that these best ones will end up arriving with the new beta versions and that all users who have the new Apple OS installed will not have problems of any kind, it could even be improved or start working seriously on the disk system in Fusion Drive. Let's see if, as the beta versions of this system progress, we have news on these topics.