That's true but technical books always felt a bit tight even in landscape orientation on my Kindle. Things like code or diagrams don't always reformat well and

That's true but technical books always felt a bit tight even in landscape orientation on my 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.