DVDs have DRM, streamed content has DRM, and yet neither of those markets have monopolies.
The fact that Amazon has a proprietary format has more impact on market structure than the fact that the format has DRM.
eBooks DRM locks it the reader, however.
Even DRM that locks content to your account, e.g. iTunes did not result in a monopoly.
I'll have to disagree.
Well, technically, when there is more than one it's called an oligopoly...
While most books that I own are hard-copy, I have an old Kindle Touch from 2012 that I use fairly often. I've received a bunch of gifts in eBook form over the years, and want to be able to read them on my computer and other devices. Calibre natively supports getting eBooks to and from devices such as mine[1], and there's a plugin out there (not too hard to find, but I won't name it here just in case) that automatically strips DRM from files during the import-to-library process. Of course, you can also just import files from your computer, and it will de-DRM those as well. Calibre also has a built-in content server[2] that's pretty configurable and allows you to share with friends; it essentially whips up a website that lets you both read eBooks in browser and download them in whatever formats you have.
You can also have it convert between most eBook formats and more[3]; you can be as granular as you want during the conversion process, or just use a default profile that comes with the software.
Of course, you can also edit any format of eBook that you've imported into your library[4]. I haven't personally tried that feature, but it looks like you'd be able to manage diagrams.
I realize that this is a fair amount of work to do on the consumer side to address the problems you've brought up, but as a multi-device reader (computers big and small, Kindle, phone), it does a great job without much hassle for me.
[0]https://calibre-ebook.com/ [1]https://manual.calibre-ebook.com/faq.html#device-integration [2]https://manual.calibre-ebook.com/server.html [3]https://manual.calibre-ebook.com/faq.html#id6 [4]https://manual.calibre-ebook.com/edit.html
Not sure if it's permitted to link to it here but it's pretty easy to find the tool that does this.
[1] https://bubblin.io/cover/stroke-of-genius-by-david-revoy
or…
[2] https://bubblin.io/cover/pride-and-prejudice-by-jane-austen
if slightly senior. I'm looking for some outside-in feedback, though kids in my neighborhood have so far liked the experience.
I think you're referencing implementations by specific companies. None of these are problems if you possess a plain ebook file.
I love ebooks, but they have some real drawbacks: you can't lend them, you can't switch platforms easily, their layouts are usually pretty limited, and they often screw up diagrams, etc.
I wish we could solve the problems associated with ebooks, rather than having weird tribal wars about them.