Comments mention Pocketbook. How good is it? I’m tempted by 10.3” screen since I read technical pdf’s (think O’Reilly or Packt) a lot and no Kindle is good for that.
While its not the same product, my 10" e-ink reader (an Onyx Boox Note 2) is the single best note-taking, annotation and technical document reader I've ever used. Its genuinely fantastic for those purposes.
I read all my Kindle books on it, it's entirely replaced my paper notebooks for note taking, and all my technical books, manuals and so on have been excellent on it.
Your intuition that this form factor is better for technical PDFs is correct, I think.
I have an 8" Pocketbook Inkpad 3 which is already decent size for reading PDFs.
They now also have a 10" version which should be perfect for it.
Although if you are also annotating a lot, I would not recommend it, as it can be slow. (but i guess this is true for any E-Ink Reader)
I read all my Kindle books on it, it's entirely replaced my paper notebooks for note taking, and all my technical books, manuals and so on have been excellent on it.
Your intuition that this form factor is better for technical PDFs is correct, I think.