How many people penned the main Voynichese text?

[dashstofsk]

If someone wrote the Manuscript in bursts, over the course of decades, that could also plausibly explain the variations in topics ("languages") and handwriting style.

I am also of that opinion. Especially since it is likely that the writers used the alphabet and language just for this manuscript and used it no-where else, made little use of it between topics and had lost some fluency in it when they next sat down to write the next section.

Compare your handwriting now to when you were in grade school.

I have and can see it is now very different. I now write my 'b's and 'd's as one loop without a cusp. My 'A's and 'E's ( unless I am writing all capitals ) are now rounded and not square and linear. My writing has become distinctly left-leaning. Also I have recently switched to preferring to write with a fountain pen which I don't have to grip so hard as with a cheap biro. I can glide the pen over the paper and the ink flows without effort. I don't have to force it down.