I didn't know the comments were 'disposable' as I thought they were also contributions covered by the CC-by-sa license. What are their status??
See comment by @joran there Specifying directly factor levels and sizes
Comments are second-class citizens. They didn't even exist when SO was created.
The moderators routinely destroy irrelevant comments, so don't put any important stuff in the comments; put it in answers instead.
I thought they were also contributions covered by the CC-by-sa license
How does that change anything? Questions and answers can be deleted by users with over 10000 reputation; comments can also be deleted (only by moderators).