Yikes... reading this I panicked right away, as I have lots of high res images in my posts! Of course I ran a quick check on some of my "zoom in" posts and phew... they still look fine. Maybe they didn't get to "R" yet in the usernames 😱

What I also noticed is, that one can indeed edit old posts. Would be a real drag, to relink all the images from other image hosters!