This isn't a very flexible medium. Many dedicated devices don't offer dark mode, which I must have to read much online. Eye disabilities? It may not work for you. I don't generally buy ebooks, that said. I prefer to have physical copies to use with my amber reading light, and which CANNOT be withdrawn via the app's/seller's whim. I have multiple/comorbid health issues; Big A. hasn't been compassionate or even reasonable to me, be it as buyer or seller. "Ableist much?" ... indeed. Oh, well.