Doesn't help that ebook publishers and device developers don't really care about that class of book. Amazon doesn't support MathML on their readers yet which me

Doesn't help that ebook publishers and device developers don't really care about that class of book. Amazon doesn't support MathML on their readers yet which means all math equations are just pictures of equations and often at the completely wrong DPI for a device like the Paperwhite so they look absolutely horrid. To top it off all these pictures really bloat the file size and slow down the weak hardware of most ebook readers. Math textbooks at least could work really well as ePubs if they just support MathML. That said I'm not sure large format books being a bad fit for most eReader devices is the problem. I think it has more to do with the often higher prices, more limitations and lack of care by publishers of ebooks. It's really really common for the paperback or even hardcover version of a book to cost less than the ebook that's loaded with DRM, you can't loan away to friends or family or resell and are often sloppily typeset by the publisher with random typos and hyphens mid line from their OCR process. Or just other bizzare problems. I've had books where the last "page" was actually several hundred pages and tables of contents not pointing to the correct chapter from books I bought from big publishers! The ebook is often a second class citizen to the paper product and it shows. Doesn't help that Amazon and Kobo haven't been making much effort in the device realm these days either. They are all slow devices because they use the cheapest SoCs they can find and do so for years so devices are often unpleasant to use and DRM makes the book buying experience for anything outside their ecosystems a chore or nightmare. They've really done very little in the past 5 years except add back page turn buttons.