OK, that's one input.....for the benefit of all the others who participate here, I will wait for more input.
I personally see quite a large value in how this can play out. The Apple infrastructure and OS X maturation have truly limited the immediate need for many of the old standby utilities that most of us maintained "just in case"....and "just in case" used to happen a whole lot more often than it seems to today.
Looking at your weekly maintenance work-flow, I'm struck by how similar it is to what mine USED to be....since about the advent of Lion (10.7) and subsequent OS upgrades, I've not needed to intervene in the smooth working of my installed-base on any of the several different platforms I run. Up through Snow Leopard (10.6.8) I was much more likely to employ at least one or two of my various maintenance utilities fairly regularly.
I'm interested to see if my experience in this respect is valid or isolated....
Given all the "hissy" stuff that happened above, and again for the on-going difference of opinions about this (even with the SuperDuper! and Onyx examples I stated above), I really don't see what benefit a further discussions would produce. While the lounge area might be OK for such a "hissy" type of discussion, I for one do not want to see that happen. My initial post was plain a simple: a fantastic price on a proven piece of software. On another Mac discussion board I am on, I got nothing but praises for such a post, and it was in the area entitled "Mac Applications". That is the what I was expecting to see here. Yes, sone ensuing discussion is fine, but not in the unacceptable manner it happened.
Going forward, and based on this last incident, I am thinking seriously of not posting anything at all about updates to software nor sales on software. That might be better, especially given how "hissy" things got regarding TechTool Pro.
So, to sum up: please close the thread. It has been "beaten to death".