... which says bug 1809580 was not enough... (look around) so, in fact bug 1809580 seems to have been enough, but when it landed, some images weren't retriggered (or all of them?), so we still had the soon to expire docker images from before bug 1809580. Hector triggered the Rebuild Cached Tasks action, which created new images that expire in a year.
Bug 1833507 Comment 5 Edit History
Note: The actual edited comment in the bug view page will always show the original commenter’s name and original timestamp.
... which says bug 1809580 was not enough... (look around) so, in fact bug 1809580 seems to have been enough, but when it landed, some images weren't retriggered (or all of them?), so we still had the soon to expire docker images from before bug 1809580. Heitor triggered the Rebuild Cached Tasks action, which created new images that expire in a year.