Pabappa wrote: ↑01 Aug 2021 15:23
The only thing keeping it from being classified as a true syllabary, so far as I can see, is that it's
too regular for the category it would otherwise be the standout example of.
The main thing keeping it from being classified as a true syllabary is the fact that it's an alphabet, and has no properties of a syllabary. The only reason it may look like a syllabary is its writing direction, which does change depending on position in a syllable - codas are written lower down, instead of along the line (or, from a historical point of view, nuclei are written to the right instead of down the line). But this obviously doesn't make it into a syllabary! [it could arguably make it into an abugida, admittedly].
If you accept that sort of syllabic grouping as making something a syllabary, then again you'd have to look at the Latin script when used for languages like Vietnamese, which typically have blank spacing between syllables regardless of whether they're entire morphemes or not. And the biggest syllabary would then probably have to be something like Tibetan, which uses non-linear positioning (and even character alteration) to spell out consonant clusters.