In addition, the novel’s final chapter is meant to convey that echoes of the First Splinter (and many others) live on in every quantum temporal variation of Jean-Luc Picard himself, as he was at the "fulcrum point in time" when the First Splinter was undone.
Ah, is that what that signified? I see that now; I'm afraid the significance of that chapter eluded me when reading it.
Oh, none of it matters because it came to an end? EVERYTHING comes to an end. Our universe's most likely conclusion is an eternity of entropic heat death. Nothing we do will matter in the scope of that.
Well, as I said, that comes down to a matter of philosophy. And I freely admit my own worldview biases me- as someone who believes in an eternal soul and afterlife, I don't believe that everything will truly end- that the things we do will one day come to nothing. If I did believe that there was nothing beyond this life- that one day we and everyone and everything we affect and which carry any memory of us will simply cease to exist- then I would consider this life, everything you do, I do, and everyone else, has ever done to indeed be fundamentally pointless, because the time will come in when there will be no us to have actually experienced it anymore; it will be functionally as if we had never been, and any good (or bad) we did will have similarly ceased to be as all the other 'us'es it ever influenced will similarly have ceased and any experiences good or bad that our actions caused will have ceased with them... and I do find that quite existentially futile and pointless.
Obviously, others, within their own belief system, do not. I mean no criticism of their differing beliefs, only explain where I am coming from.
And that is probably where the issue lies for me. Because I agree with you- afterlife or not, in life, everything does end. I believe that everything we do will carry on a legacy beyond that; others don't. Either way, though, either worldview- whether you find meaning in what we do now regardless of end, or believe meaning exists because whatever we do now has consequences that will outlast the material universe... in either case, in order to have meaning, a person has to make decisions, do things in the now.
Whereas, to my mind, erasing a timeline so that it never came to be means that, in essence, those people (or versions of them, in the case of legacy characters) now
never existed. They never made those choices, did those things that mattered (in either worldview), because they simply never existed to do things and make choices to begin with.
And that's the difference, to me, between 'this universe ends' and 'this universe never began.' It's the same- to my view- as the difference between Kirk's death in Star Trek: Generations, and Kirk being prevented from ever having been born in the Of Gods and Men fan-film. Both end Kirk's story, both mean he is not around anymore- but one is fundamentally different from the other (and far less satisfying).
Now, that said, the notion that other traces do still remain- one that escaped me on the original reading- that the splinter timeline wasn't simply entirely unmade so that it never existed to begin with, does change things, a bit; I'll have to sit with that a while and consider.
And, again, no offense was intended in the exposition of these ideas.
But that is why- perceiving that 'unmaking' to be the case- it struck me far differently merely than an 'everything ends' ending.