There isn't a direct way to import from WordPress so far, but there is an open API [0] you could use to move your blog. That's the tack we took for our Hugo import tool [1]: just taking posts from a previous blog, parsing out the metadata, and publishing via the API. For WordPress, you'd also just want to get the posts converted to Markdown for the best experience in WF.
As for exporting your content, yes you can do that at any time. Everything is downloadable as JSON, CSV, or a zipped archive of plain text files.
As for exporting your content, yes you can do that at any time. Everything is downloadable as JSON, CSV, or a zipped archive of plain text files.
[0] https://developers.write.as/docs/api/
[1] https://github.com/writefreely/hugo-importer