-Find new uses for previously unavailable chords! in it approximate had
Working backwards, I don't see a need for previously unavailable chords. BTW, these chords were previously unavailable, because we weren't using the space bar, right? That's how I boil your suggestion down, you're saying that the steno keyboard could use a dead key--and we conveniently have one, on our qwerty keyboard, the spacebar.
I don't anticipate faster finger-spelling. A*/H*/R*/S*/T* this is an example of fingerspelling. It's combining a letter with a dead key. But that's exactly what you are doing, only you prefer the spacebar, to the asterisk. You might point out, that you're using the entire QWERTY keyboard, the whole alphabet, so, for example, 'L' is 'L', and not 'HR' for 'L', along with 'TPH' for 'N', etc. That is, you're not hitting as many keys simultaneously, it's less work this way. However, how much less work is it? Is hitting keys simultaneously, an *issue*? When you write steno, you're generally hitting keys simultaneously, every time, every stroke. Do we mind? It seems to me, that one buys into the idea of chords, or rejects steno entirely, do you picture a third way, of trying to minimize the chords from steno? Use a QWERTY keyboard and there are no chords, if you mind chords. In steno, you're up to your gills in chords. And I don't take this to be an issue.
What about easing into steno, by mixing it into your regular keyboard usage. To me, this sounds confusing, too much overlap between the two paradigms. I like the idea of a gentler learning curve, I can understand exploring the question, must we abandon our established habits, cold turkey? And climb this sheer vertical wall of a learning curve to do steno? But, I do, in a way, myself, totally, ideologically abandon the QWERTY keyboard. The keyboard used to do steno, is a steno keyboard. That's the keyboard. If you use a qwerty keyboard, then your qwerty keboard is a wanna-be steno keyboard. Those extra keys, are to be ignored, they are now just in the way, it's an inconvenience that they even exist. The steno keyboard has the steno keys. And a steno keyboard does not label the keys, the 'a' key, the 'b' key, there are no labels. Your qwerty keyboard does have labels, but this is graffiti, your keyboard has been defaced, which is entirely regrettable. My comportment, is this. But is this attitude necessary? Is it the only alternative? Yes, I actually think that it is, that this dogmatism is well-advised. The idea is to join the steno community. If we lose that idea, then we lose a major selling point of steno, that it can be done on a steno keyboard, and thousands are doing it, at 200wpm. It exists. If you're going to ease into steno, then have it be actual steno that you ease into (is how it seems to me).
Extra keys that don't exist on a steno keyboard are, in my eyes, not to be used. There may still be debate in this, in your eyes, but I'd encourage you to picture the keyboard that way. it's not a QWERTY keyboard. It's a steno keyboard. It's not a happy marriage between the two, opposites attract, chocolate/peanut butter qwerty/steno. It's steno. It's not fingerspelling everything, anymore, and it's not having umpteen keys, anymore.
You also suggest that we could avoid toggling Plover on and off, could leave it running full time. That is, if we want to revert to qwerty, we just type normally. But all the chords also work. I get this, as appealing if you think you can manage some 50%, maybe 70, of words using steno, but when you're stumped you want to fingerspell. So, 'the q-u-i-c-k brown fox j-u-m-p-e-d over the lazy dog'. right? And, when you fingerspell, you revert to qwerty. Well, I'm not, I guess, really offering another argument against this, but I picture the schoolmaster in Pink Floyd The Wall, if he were hovering over you. Then, when you go to QWERTY out a word, he could rap your knuckles with a RULER, and growl 'the boy fancies himself! A POET!' QWERTY is evil.
My suspicion is that this is in fact the only way to learn steno. You can set out to prove me wrong, but you will have no successors, even if you do. I'd bet money.