Yes! See https://github.com/vector-im/hydrogen-web/releases/tag/v0.3....

Great.

You can use any matrix client to interact with the customers. New customers will appear as direct chats in your preferred client.

It won't work on newer books. Kindle has a new DRM and if you try to install older versions of the kindle application you will get an error.

You need to download the books from the "Manage Your Content and Devices" page using the "Download & transfer via USB" link. Those still use the old DRM.

Unfortunately that option is not available for all ebooks.

That's a bummer. I haven't bought an ebook in a few months, had no idea.

You were lucky. Most e-books from Amazon come with DRM and restrictions preventing you from reading them on devices that do not have a kindle app. I once purchased a textbook (that wasn't on libgen) on Amazon and had to use the Kindle app on Windows to read it. It was not readable on Kindle Cloud Reader and Amazon does not have a Kindle app for Linux. I returned the book after using it (only needed it for a week) and got a refund.

Better memory footprint and a tiling window manager. Linux does not inherently have worse hardware support.