Minuscule letters were invented to write on paper and similar materials, because curved strokes had lower probability of tearing the material (as opposed to majuscule letters' angular features, adapted to carving in stone or similar materials). Now that we're not restricted by materials, might as well only use one case
Is that well documented? I thought it was just because it makes writing more fluid, and people tend to evolve towards fluid movements when they repeat the same ones all the time as it requires less energy. Ex: high-level musicians or sport practicionners.
I've heard that that's the reason alphabets from languages in the South East Asia (like Thai or Khmer) is all about circles as to not tear the writing material back in the day - leaves.
I did a deep dive on this recently (my day job is in architecture, and in the US we infamously MAKE ALL NOTES ON DRAWINGS IN ALL CAPS BECAUSE THAT'S THE WAY WE'VE DONE IT SINCE WE HAND LETTERED IN BLOCK PRINT SO THAT DIFFERENT DRAFTERS' SHEETS ALL LOOKED CONSISTENT) and it turns out that's 100% just an acclimation effect -- the old conventional wisdom of skilled readers recognizing lower-case word shapes doesn't hold water. If tomorrow we deleted lower-case letters from every Latin font on earth, given time we'd be able to read all-caps text just as fast as we currently read sentence case.
Which was disappointing for me to find out, since I REALLY HATE SHOUTING AT CONTRACTORS THROUGH THE PAGE ALL THE TIME and wish I could make a convincing case for sentence case, but oh well.
That's good to know. And in the premise of this thread it's relevant. However, since we're used to sentence case now, it still makes sense to keep it that way unless there's a compelling reason to switch.
On the other hand, street signs in Sweden, where I come from, are uppercase. I was completely used to that despite reading mostly sentence case in any other situation. However, since I moved to Denmark, where street signs are sentence case, I now feel like it takes slightly longer to parse signs when I go to Sweden. I guess if I'm correct, that's a case for quick acclimatation, as this happened over only a few years.
Come to think of it, is there actually much of any point to capital vs lowercase letters? You know what the first word of a sentence is anyway because of the period before, and names can be identified by context. Why do we even have capitalization in the first place?
As I mentioned in another comment, the original reason we have majuscule and minuscule letters is the difference in materials they were written on. Having them persist in the typesetting is in fact more of a historical artifact