Appreciate the question denetoet. What I like about SuperDuper! (Carbon Copy Cloner is another excellent program that does the same thing (although it does one additional thing)) is that it makes a bootable backup/clone of my system. Yes, I said bootable. It's almost like having another machine, and makes recovery/new Mac OS installation (or even doing a clean installation of any Mac OS release) easier, faster, and I have much more control over all that. For example, if I were to have "difficult and/or impossible situation to repair software issues" that disabled either of my Macs, I can boot either machine from their most recent/respective SuperDuper! backups (I do my weekly maintenance/backup tasks once a week, typically on a Saturday; of course I am doing daily disk cleanup on my own), and either do a clean, fresh installation of the Mac OS and a subsequent "migration"/copying of all my needed "stuff" from the backup, or just do a complete recovery. No worrying/hassles, etc. about doing it off the internet, as it is a local sequence of events.
When I upgrade to Mojave (will be sometime in December, after Micromat releases a Mojave-compatible version of Tech Tool Pro (it's the last application I am waiting for)), here is what I will do:
1. Download the latest Mojave installation file from the App Store (I suspect it will be OS 10.14.2 by then).
2. Make a copy of that file in another location on my internal SSD.
3. Go through my usual maintenance/backup tasks, ie, run Onyx, then Tech Tool Pro, and finally SuperDuper!.
4. Restart the respective Mac from that just-completed SuperDuper! backup.
5. Launch Disk Utility from there, and have it Erase and Format the internal SSD.
6. Navigate to where I made a copy of that Mojave installation file (step 2 above), launch it, and let it do a clean, fresh, "virgin" installation of Mojave onto the internal SSD.
7. At the end of that installation, I'll be offered the opportunity to "migrate"/copy needed "stuff" from my backup. I choose that, and it proceeds.
8. When #7 completes (and after a couple of more setup "steps"), I restart my Mac, with Mojave.
9. This step is for my situation. Install the Mojave version of Onyx, and launch Tech Tool Pro to create the eDrive partition.
That's it. Seems like a lot of effort, but actually it goes smoothly. And I have been doing it for so long, it is second nature to me. And I always have success with it. (I even do it when I want to re-install an intermediate version of the Mac OS, instead of just upgrading in place).
There is nothing wrong with using Time Machine, and most folks on here use it, with success. It does the job well. I just like having more control, and especially like it that the backup is bootable. That feature alone has "saved my bacon" a number of times.
Like Time Machine, one can do scheduled backups/"updates" with either SuperDuper! or Carbon Copy Cloner. (I don't need to do that). The two differences between the two products are 1) SuperDuper! (SD) costs $27.95 US, whereas Carbon Copy Cloner (CCC) costs $39.99 US, and 2) CCC also backs up the "hidden" Recovery HD partition, whereas SD does not. That is not a detriment for me, as 1) it gets created on a clean installation of the Mac OS, and 2) there are other ways of creating it. Either SD or CCC can be used in "trial/demo" mode, with full functionality. In fact, I used SD in "trial" mode for almost a year before I paid for it. The main benefit I saw after paying for the product was that it was/is faster.
