There's like a handful of truly useful things on the Internet. Most of the useless things though take up 90% of time on it.
I'm failing to see the value at this point.
The book, along with others like Hooked, remind me that we have to be very careful about the technology we use on a day to day basis, because it effects our brains in a way we might not want it too. Our brain and willpower is being tested against the skills of thousands of incredibly smart and talented designers, developers, product managers, et al.
Having chosen to abstain from apps like Facebook or social media websites, I don't feel like I lost anything. If anything, I've regained more time and mental space for things like getting deeper in my career. I'm not a luddite, as I am still a big believer in the productivity and information gains via the internet and computers. But our attention is a resource that a lot of companies want. And yet, I only feel like it's more recently that we've begun to question whether the benefits these companies give to us is worth the change in ourselves.
Because of mindfulness, I have recognized the need to distract myself (via Twitter, Reddit, E-mail, Whatsapp) is sometimes a symptom of not wanting to deal with something that is hard or uncomfortable (e.g. paperwork, making a decision, etc.).
Yet we know that become deep at something we care about, we truly do need focused time (Deep Work by Cal Newport is a worthwhile read). So I think it's really in our best interest to only choose apps that provide a lot of benefits with only marginal drawbacks to our mind, and to be very careful about how often we use them.
Although I happily put plenty of hours into single player RPGs (currently Persona 5 and Breath of the Wild). But those have an ending, and they don't require me to schedule my life around them in order to play them.
In fact they let me drop in and out of them very quickly, since they suspend and I don't have to connect to any networks.
edit: formatting