#Google will stop providing #free #storage for #GooglePhotos, even at lower resolution, starting #June2021: https://www.androidauthority.com/google-photos-free-storage-1176862/
While 'high quality' (nor 'original quality') photos uploaded before that date won't suddenly be counted towards your 15GB 'free' storage, any photos afterwards will count towards your quota.
While it promises better tools for weeding out low quality photos, I expect more users will look into alternatives such as #NextCloud and #SyncThing.