Alsoft has always taken a lot of time to release new versions of DiskWarrior. For instance, seven years from 32- to 64-bit. Expect DiskWarrior 6 for APFS in due time. The weird thing is that they have not released DiskWarrior 5.3 yet, since it is for HFS+ (not for APFS), so it should not be hard to develop. It seems that key engineers no longer work at Alsoft. Is Rusty Little (Alsoft/DiskWarrior Project Manager) still there?
Not working on it or hardly anyone wants it?
Starting with macOS 11 (and continuing into 12-13 )
"... APFS or APFS Encrypted disks are the preferred format for a Time Machine backup disk. If you select a new backup disk that’s not already formatted as an APFS disk, you get the option to erase and reformat it. If the disk is a Mac OS Extended format disk that contains an existing Time Machine backup, you aren’t asked to erase and reformat the disk.
..."
Use Time Machine on your Mac with a Time Capsule and with USB and Thunderbolt disks.
support.apple.com
There are relatively few new HFS+ time machine volumes being created. The 5.3 'features' are:
"...
What Will Be Coming Soon
- DiskWarrior 5.3 will be released to provide compatibility with macOS 11 Big Sur. DiskWarrior 5.3 will be a free downloadable update to previous versions of DiskWarrior 5.
- Support for Mac’s equipped with the M1 chip (ARM).
- Rebuild of HFS+ Time Machine backups and External Volumes formatted in MacOS Extended (HFS+) format.
- DiskWarrior Recovery Maker 1.5 for creating a bootable DiskWarrior USB Flash Drive.
What Will Not Be Possible in DiskWarrior 5.3
..."
www.alsoft.com
The M1 version wouldn't be able to do much with the default internal drive in a Mac. Mainly effective upon just older external drives that were in HFS+. Users with new Macs who hook up a 'blank' drive will be walked through a process to create a AFPS Time Machine drive. 5.3 does nothing for that.
Not sure why M1 systems were added to the feature list. Seems like a better allocation of effort would have been to get 5.3 onto the Intel macOS 11 sooner rather than later. At this point, macOS 11 is only going to critical security updates.
macOS 11 introduced the 'sealed system volume' so the OS doesn't run on anything but AFPS. ( and the tool could not really do much to fix that sealed drive anyway even if had something to understand AFPS fundamentals ). Even on macOS Intel, the boot, system drive isn't going to be covered. Primarily, all can do is point at older drives and drive that deliberately avoid the default paths to putting an APFS on a drive.
If they got 5.3 running on macOS 11 the tool couldn't repair the drive it was running on. If your recovery drive fails also how do you repair or make another?
Anyone who has access to an older mac that runs 10.15 and a DiskWarrior Recovery boot usb drive can take external disks and just hook them to it. If the external drives are the only primary targets at this point, then substantially changes the requirements. Probably got "wish I had support on macOS 11" requests, but how many folks actually had hard pressing requirements for it? [ Sure there are a narrow subset of users with internal 3.5 HDDs in HFS+ , but mostly likely good for just external drives. ]
If they wanted to do 5.3 they shouldn't have put much effort into doing "6". If the more vocal user base was hyperactive about v6 then wouldn't make much sense to put major effort into 5.3 , if mainly trying to keep them happy (as opposed to addressing it in technical order. )