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Pasting a URL *to edit an existing MD link* would create an (invalid) nested link. There was no escape, beyond “Paste As…”. UX deteriorated; the convenience became a hindrance.
3. The feature now requires manual opt-in. Pasting URLs on a selection replaces the text (rarely matching user intent) unless MD paste is explicitly triggered via “Paste As…”, a flow more tedious than writing the 4 extra chars manually.
GIF from @github’s comment UI, which implements this pattern *really* well.