I find books easier to read than words on a screen. Could be the whole contrast thing though.
F.lux (or an equivalent) and changing the background/text color helps mitigate that
tremendously. After that, it's just a matter of getting used to it.
Personally, I'm long past the point that it's easier for me to read on a computer, due pretty close to entirely to the zoom feature and the mentioned color alterations. Large text at will with a more pleasing color contrast, me hearty. Black text on a white background, even the faded, yellowish white that books end up being with time, is one of the worse color contrasts for reading, imo. Just reversed is much more soothing, and a less strident contrast even more so. I use a grey text on dark blue background, m'self.
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And yeah, Tack, the cost thing is why the genuinely tremendous works are probably going to be limited to commercially unpublished/unpublishable works -- or, at the very least, digital -- because of the lack of fiscal motivation. Without that incentive to break things up or push out shorter works, stuff can get as large as the author wants it to. Alternate publishing methods -- see stuff like Worm, web serials in general-- are another potential bypass to that.
And aye, I'd probably have a library, too, because despite the fact I read almost entirely on the computer these days, I still have and fully intend to maintain a physical collection. I like physical books, they're just considerably less convenient for me at this point, especially since I was gifted an e-book reader. Portability, ease of reading, largely cost (due to the mountains of (legal, even!) free material)... it's all good stuff from here on out, digital wise.