I only thought of using alt-text today, and this works. While the image is still loading, my post can show a message about it.
Thank you for pointing out this feature! I am by no means an expert on BBcode and was struggling to find some way to handle embedded images in my announcement thread because they do seem to take a long time to load, at times, regardless of where I host them or how optimized they are.
I'm going to put this in place right now, really appreciate it!
Best regards,
Ben