Haters gonna hate tho.

But in all seriousness, I'm not saying that hamburger is always okay. But sometimes it can be a good thing. The article you linked doesn't have any data to back up their claims as far as I can see. While I don't disagree with what they are saying it seems to be heavily focused on mobile apps, rather than websites. Bottom tab bars are not a great approach on mobile websites. iOS actually has a hidden button at the bottom of your screen in safari that brings up the browser chrome. This prevents you from putting a tab bar down there even if you wanted to (without some hack work around). So what does that leave you?

I think that visible navigation is great for apps because apps are typically focused experiences. Sites however often have a hard time limiting themselves to 4-5 nav options without also including lots of subnav within those sections.

Again, this site doesn't really need a burger. Instead I think based on target audience they chose to go with the minimal aesthetic the burger provides. I'm sure their site is performing just fine. There's also a possibility that they wanted you to scroll through the site rather than immediately click a navigation link. Blanket statements like "The hamburger is bad" are most often bad. ;)

Also, in their linked example for sites at the bottom of the article they show a screenshot of time.com where they've removed the burger and have all the links to the site exposed. That is AWFUL! Can you imagine browsing a site like this? "As long as it’s evident as website navigation, people will still scroll past it and will definitely be immediately exposed to the available options." Or they will close your site because they're tired of scrolling 1.5 screens to get into the content they came for.