The majority of comments sections were created as a means to build communities. In the early days of the internet, this made sense, as social media was, by that point, not much more than messageboards, usenet, and IRC.
As time went on, and sites like friendster, myspace, and facebook began popping up, comments sections became less necessary, as seen by the fact intelligent comments and community building discussion largely disappeared as people who appreciated the social aspect of the comments section migrated away to these networks that essentially let users build their own messageboards/comments sections as they saw fit, curating the list of people they wished to hear from.
Now, with facebook/twitter taking up most of that weight, with dedicated forums/messageboards picking up the rest of the slack, comments sections are essentially like the appendix of the internet. It's a thing that maybe was necessary once, but isn't needed any longer, as its function has been replaced entirely by other, much more well read means.
There's absolutely no reason to keep them, as they basically cater only to people who have yet to figure out better conversations are happening elsewhere, and happening much more easily and much more manageable. When it comes to online discourse, people still frequenting comments sections are not too much different than older people who still brag about not owning a cellphone. They COULD improve the way they communicate and spend their time talking, but they willingly refuse to.
Plus most sites are just now realizing whatever percieved bump in views having that comments section tagged to the bottom of your site might bring is pretty much NOTHING compared to the views and time spent reading thanks to a link or a share on any number of other social media platforms.
Not to mention that in the decade+ of comments sections existing, the majority of readers have been essentially trained to skim the article as fast as possible to get to the "good shit," which is not much more than Springer audience throwing nested elbows at each other. Think about how many shared articles you've seen that either come with the warning "Don't read the comments" or "Man, watch out for the comments," all which basically ensure the article (especially if it's more than 400 words long" is going to be raced through to get to the part that sounds the most enticing as a reader: Watching people fight each other and say stupid shit.
So, look at it from an editor's point of view:
You're not building a community out of your commenters
You're not getting any real extra money out of those commenters
You're devaluing the work of your writers by allowing those commenters to glue themselves to their pieces.
Why the fuck would you keep them outside of basic inertia and borked conventional wisdom that says you're supposed to have them there?
Basically - without a comments section for people to race towards the instant they read a headline - people might have to actually READ an article. And then digest it for a second, before going back to their twitter/facebook/tumblr, or their dedicated, moderated messageboard of choice, and weighing in on their own.