When I edit photo files in Photo Gallery, I save changes in lossless TIFF format and not the original lossy JPG.  Photo Gallery worked very well for how I used it; organization, tagging, initial editing and cropping, then saving as TIFF for further editing in the GIMP.

While I like the recent changes to Microsoft Photos, that save-as-TIFF function still seems to be unavailable.  I haven't found a way to tag files in Photos, either.   If I'm missing something, please set me straight.  Otherwise, as long as Microsoft is making improvements, those two would be welcome at my place.