[kappuchino]

Yes, if you count the export from Pinboard to Bookmark.html and then import to Linkding for once.

One weird thing though is, that Linkding does not have marking a bookmark "read" on first click: This is the most useful feature on Pinboard for me.

Via the pinboard-bookmarklet I pile all the links I come across, then mass read them and can track what's been read because the first click marks them on Pinboard.