every time I see analyses written that way, I will consider that type of notation an error. That is all.
I repeat, I understand there is a logic to it. There is also a logic in placing books on a bookshelf according to the color gradations of their covers. Just the day before yesterday, I went to a friend's new house and she did a wonderful job, simply by curating the colors of the books on the bookshelf; it looked like an art installation. But if I saw something like that in a library, I would start laughing.
The notation we are talking about is, in my opinion, ridiculous. Just as ridiculous as a book titled "Treatise on Tonical Harmony," simply because the adjective "tonical" does not exist in Italian. But this isn't entirely relevant to this discussion.
The discussion concerns the analysis of that chorale. Well, FOR ME, that notation is an error. When Piccinesco says that his problems in the analysis do not depend on that, I would be inclined to say that if he knows his problems in the analysis, then he should solve them. If, instead, he thinks there is also something to learn from this forum, then he must resign himself to receiving my opinion as well.
And my opinion, if it hasn't been understood yet, is that that notation is wrong, useless, ridiculous, and ahistorical. If a competent professor teaches it, I would be very curious to have him here on the forum to explain to me for what reason he teaches this method. Perhaps there is an even greater logic than that of book cover colors, I am sure of it.
But the history of musical analysis—which is history, not my opinion or RedScharlach's; I repeat, THE HISTORY of musical analysis—millions of composers, both dead and still living, theorists, musicians, amateurs, good and bad people, tell us that the recognized ways of marking the harmonic analysis of a musical piece are two: Stufentheorie and functional theory (in its various nuances and notations).
Therefore, I cannot help but consider that way of writing harmonic analysis to be wrong.