I would not even try to use something like DiskWarrior on an APFS volume. A disk utility may not correctly recognize the format and could cause data loss if you try to use it to repair your disk.
DiskWarrior and TechTool Pro will probably need an update (I would be surprised if they wouldn't prepare these patches already), Quicken likely won't need an update, as the file system should be transparent for most applications. In the case of CCC, it depends how precisely it works, which I don't know. If it's basically a front-end for macOS' own cloning features (which exist and which a bunch of other similar software use), it might not need any update. If they are using their own cloning routines with deep ties to HFS+, it will most likely need a patch.
With the current preview, you get the option to convert to APFS or keep HFS.
Alsoft (DiskWarrior) are notoriously slow at updating their app, even when the app has glaring issues. They don't update for a year or more at a time. You certainly won't be able to use it on AFS volumes. Carbon Copy Cloner and TechTool will most certainly be getting updates. As for Quicken ... if you're really adamant about sticking to that ancient software, you can always run it in a virtual machine.
CCC and DiskWarrior are absolutely essential for me for drive maintenance and back ups. Both have saved my bacon countless times.
I would say wait until Google updates their side of things, go back to HFS+ or roll back to Sierra.
Given that this is a beta (and first developer preview at that), you may be in for a bit of a wait.
You can actually make bootable clones of your (Mac) drives easily with just the standard Disk Utility.
You can and that works well if you just want to do it once, but if you want to keep an updated clone around, CCC is good to have since it can just increment the changes rather than a full clone each time like Disk Util does.
That's true. DU is not necessarily meant for regular and/or incremental backups, but rather cloning for the purpose of migration of boot disks.
That is cool, but CCC offers some very good options, like the ability to archive at the root level things that have changed since the last clone. It can also schedule the clone, remind you if it's been too long, run scripts before or after the clone. It's a very useful piece of software and the developers are very diligent about keeping it updated.
HFS+ will continue to be a supported file system for apple (at least for now), and so I'd expect Alsoft to support both file systems.
