In fact, in networking, where by its very nature interoperability is the key value, the Marketectures that you have to avoid are the one's that are different from the norms. Vappies can be excused because they do send signals about the directions that networking may take someday and they are often legitimate attempts to communicate necessary information. When they are not, at least the company is not asking customers to buy or evaluate any specific product. They are just looking for a little attention. We can ignore the Vappies if we want to.
Premies are much more insidious.
With a Preemie, the vendor announces specific product availability long before it is stable and ready to deliver. Every announcement has some blurb from an industry analyst or customer that is crafted to create an illusion the product is stable and usable. You have to be very careful about separating reality from smoke. Availability is announced to be three or more months in the future. I have to tell you, from my experience rolling out lots of products, you can be three months away for many months or even years.