Way back when Google Drive was synced with Google Photos - i.e. I've had my photos backed up to Drive with Google Backup & Sync, and they'd automatically show up in Google Photos. I need to free up some space on Google Drive now - would deleting the original photos on there also remove them from Google Photos, or is Google Photos collection been copied there, now independent of the original Google Drive files?
I found the answer. Apparently because the relationship between the two products was confusing, starting in July 2019 Google decided to separate them so that: