I suggest reddit.com/r/programming, Hacker News obviously, and YourVersion.com for finding new stuff to read based on your interests, and then you can usually find more to read without too much trouble. There is always more!
The other point you illustrate is that most reading on the internet is scattered into bits and pieces. Going through all of those topics in one morning is too much, for my brain anyway. I'd much rather read on one of those topics at length and work out some problems and code. Reading small posts here and there may make me feel smarter, but I'm not convinced it actually makes me smarter. I ask myself, "How does knowing this change my expected behaviour or my anticipation of the world?".
(I'm not affiliated with the site, I've just found it to have a good signal-to-noise ratio.)