I had Disqus, the commenting system, slightly misconfigured, so I redid the commenting section. Because of this, the existing comments were lost, but hopefully everyone can live with it.
Now the Disqus settings should be ok, but as ways with Internet pages, I don't guarantee that your comments will be visible forever. If you place a comment on this blog, you should probably expect it to disappear within a month or two to avoid bigger disappointments. I don't delete comments on purpose, but since the blog is only a collection of static pages, I have "outsourced" comments to 3rd party and don't have that much control over them.