For PDFs and non-fiction manuals and guides I highly prefer a proper powerful tablet with a color screen. E-readers just don't have the power, refresh rate or UX to handle browsing around in 300 page books with pictures.
Funny enough, I found this holds true especially for things like programming books where I very frequently go back to see if I understood something correctly, and having a book separate from my computer in front of me is also useful.
There is plenty of non-fiction that doesn't come in PDF form. It is quite readable on a Kindle.
Things like code or diagrams don't always reformat well and scrolling is a pain in the arse.
Life is just much easier with a bigger screen. Where I'd really come unstuck is when someone gives me a whitepaper or customer documentation that is only in PDF format. No reformating even if you want to.
Amazon used to sell the bigger Kindle DX but they stopped making it. So if you're buying a new device anyway there doesn't seem to be much downside to switching to Kobo, that I've found anyway.
Remarkable and some other companies have A5 or 10.3" screens but these are too small IMHO. You will still end up zooming and panning.
That’s what lead me to switch to Kobo a few years ago, and it’s been great. Though some small press releases sometimes skip the kobo store still.
The Kobo Elipsa is the first ebook reader I've used where I can read PDFs without zooming, which is a game changer for me.
In general I think DX or Elipsa sized screens are more useful for text books even in epub format.
It's much faster than my old Kindle but I was never really that bother about the old Kindle's page turn speed. The Elipsa also has much crisper text but again I thought my anchient Kindle was mostly good enough.
The Kobo search features are much better. My old Kindle's search was too greedy which made it pretty much useless as I couldn't narrow results. e.g. I couldn't search for "act" without getting results for "actor" as well.
The only irk I've had with Kobo is that the default PDF reader doesn't let you set a zoom level to reduce margins as you read. You can zoom in but you need to zoom out again to turn the page.
That's only a very minor issues though, I can still read things fine with the default margins. Installing KOreader or Plato was as simple as dragging a file onto a USB drive and give you every ereader feature you could want including margin stripping PDFs.
I considered a Remarkable 2 but I'm not really one for hand written notes and I wanted a frontlight, which the Elipsa has but the RM2 doesn't.
I actually wish I could have bought the Elipsa without the bundled case or pen as I don't use either. The handwriting to text or drawing to flowchart conversion is fun to play with but it's not something I need, I'm strictly using it as a reading device.
I'd guess that the Elipsa would be a good replacement for a Kindle DX but that's caviated by how you personally want to use it. There's something very pleasing about keeping an old ebook reader going though so it might be fun just to keep using your DXs until they absolutely die and then see what's on the market at the time.
Hope that helps.
https://www.theguardian.com/global-development/2018/oct/12/p...
Like a screen big enough to comfortably read PDFs. 10.3" on Kobo Elipsa vs 7" on Kindle. IMHO that makes the Kindle only really useful for fiction.
There's also Pocket support for reading offline web articles.
Overdrive support so I can borrow books from my local library for free.
Free Dropbox syncing without having to email everything when I buy a book from someone that isn't Amazon e.g PragProg, Packt, etc. (Dropbox does support email though if you do want that).
In theory I could also use the pen and take written notes on my Elipsa too but it's not a feature I was looking for.
The other stuff you mentioned, like Kindle having a large purchasable library, is also true for Kobo right from the homescreen. They're also priced similarly if you match specs and available for same day delivery from Argos in the UK.
Finally, I know I could hack my last Kindle but Kobo make that really easy out of the box. Installing Koreader, Plato or anything else is simple even if it's not required for everyday use.
So for me it's the other way around. Amazon offers nothing I want that Kobo doesn't have.
Different people have different usecases but I don't think I'll go back to a Kindle now I've switched. Kobos are very easy to live with.