This weblog has more than 2000 posts in it, and from time to time I sift through it looking at old work looking to make it better.
I can see that my writing improves to the extent that I believe that other people will read it. The best written pieces are publishable, at least in the modern web sense of publishable. The ones that need improvement usually need a new lead paragraph, a bunch of formatting cleanup, and some kind of conclusion.
Rarely does anything here reach the form of art that gets thousands of words to tell a story, at least not all at once. To do that properly you need an editor who not only makes sure that the cleanup gets done on the words but keeps you on track for the long process of telling a story start to finish.