I'm actually pretty ok with these types of articles. They are generally well-researched and well-written—giving technical introductions to important concepts.

As always, it is important to be wary of the reasons that an author writes an article. If there is an advertisement at the end, then the author motivations (at least in part) are clear. But I often find that promoters of new systems and tools are able to present excellent critiques of established tools and practices. New things are USUALLY made to address the shortcomings of existing things. You as a reader have to parse whether their arguments are sound and maybe do some more research before you can make a sound judgement on the matter.