In my own experience, the phases are fluid. I will get comfortable publishing on a specific topic, or with a specific technology, but find myself returning to anxiety when I step outside the usual fair (there's a reason I've done exactly one podcast
Now that I am doing more to promote using online tools, I've certainly seen the anxiety and uncertainty in others, too, as they consider the implications of publishing online. Part of providing support and encouragement to my colleagues and students is remembering this anxiety as I work to encourage engaging in online publishing.
Table from Developing Digital Portfolios for Childhood Education by Marja Kankaanranta. 2002.