My company has been publishing blog posts on Medium for about 2 years, and it's time for us to migrate to a blog on our own site instead. I'd like to migrate old content over to the company blog, updating the canonical URL to point to the company blog in the process, in addition to publishing all new posts on the company blog before we place them anywhere else.
Someone asked a similar question about a year ago (Migrating out of Medium) but didn't touch on Medium's "Customize Canonical Link" that lives in the advanced settings of each post, maybe because this field wasn't yet available.
My assumption is that if we set the canonical link in Medium to point to the new version of a post on the company site (and also set rel=canonical on each post on the company site, too, just to be safe) that we shouldn't be dinged for duplicate content. But I'm not sure about this.
Has anyone had experience with setting a "new" canonical URL for a piece of content when migrating but not redirecting, or know whether this can cause issues? If we see a short-lived ding as Goog picks up the new canonical, that's not a huge deal, but I'm concerned about a longer-term penalty.