I personally think the danger is similar to the one SoF has: in the wrong hand, it can cause damage. you just don’t copy/paste everything that you find on SoF, but that requires a certain base-level.
my worries with advertising novel approach too early is that they end up harming less-knowledgeable people who don’t understand the pitfalls and fine-prints and just jump on the hype.
in the hand of an expert who can evaluate good and bad of a proposal, it can be a great tool, but I would like more care, you cannot control how people actually use the tech preview