Consider that Mozart feels much less present in concert halls precisely because he does not have a writing style that fully suits the
Piano. As Frank used to say, unfortunately even today there is a lack of lucid ideas regarding what a student should learn. Mozart is made known as a simple author who is quick to learn. Simple and catchy themes are proposed, and thus they remain imprinted in the heads of novice pianists.
When one then progresses with study "one always returns to old loves," Renoir used to say... it is seen with a completely different thought, but who knows for what reason everyone tends to deepen their knowledge of the entire instrument in the true sense of the term, far and wide across the keyboard range, whereas Mozart does not always push to such extremes.
Unfortunately, the "time" factor always returns. What an enigmatic and problematic word for the performers of all... times... indeed.
Mozart composed for harpsichord or fortepiano and why not... clavichord... but now we have Mozart's music and we lack the two most important things... Mozart and... the harpsichord... in the sense that if we put a harpsichord in a concert hall, the gentlemen preparing to listen to it will position themselves within a mental parameter that includes... (philology, ancient, reinterpretation, cobwebs etc. etc.). Perhaps out of the side of the stage pops up a rasta with mirrored sunglasses ready to improvise jazz...
C.Ph.E Bach had the idea of using both instruments of the era, and therefore both the harpsichord with the piano and forte as well as the old-fashioned harpsichord, not thinking at all about putting the former in the cellar in favor of the latter. And instead, the old-fashioned harpsichord seriously went into the cellar, but was also brought back into vogue in a moment of need... and so, more than 100 years later...
The question is... why?
Because you cannot revive eras without reinventing them... and Landowska knew this well when she had a diabolical instrument built, complete with an iron frame, that had a truly unique range of timbres. She brought a new Bach back to the concert halls but with a new harpsichord. Landowska certainly felt deeply the "novelty" and "eternity" of Bach's music, but she also felt the limit of playing an instrument of the era for herself as a performer and for the ears of those who were meant to listen to it.
I think you know Trevor Pinnock and Kenneth Gilbert... consider that I had the complete works of Bach, i.e., almost everything Bach had written for harpsichord... endless hours of music without any sense... and assuming that these are considered great performers... that sound and that music were "dead" to my ears... and I assure you that I love the sound of the harpsichord... but then I asked myself... why? Simple... that wasn't Bach... it was his ghost...
These are all cerebral considerations and digressions perhaps, but I assure you they contain truths.
To revive an ancient author, it is not enough to play them with all the proper formalities. You must love them to such an extent that you enter their mind and re-present them in a new way, while naturally always remaining faithful to their idea of composition projected into time.
Remember, in fact, that Bach did not compose for harpsichord but for "Keyboard"... Clavier... and while the harpsichord has a well-defined time, the "keyboard" is timeless.
Forgive the length, but I am... prolix by nature...
I hope I have explained something useful.
Anyway, I await the evolution of the k. 283.