This is the worst part about academic publishing too. Researchers should keep blogs to record results, and the RSS feed is the publication.
not publishing to a blog is the same as not publishing elsewhere. It's not the medium that's the problem.
It's a lot of work to publish, and publications won't accept negative results as interesting.
By self publishing on an accessible medium, negative results are more likely to be shown. Not every blog post would even be about results, but about the process.