Sepiana - seems I was wrong about not being able to get disks. I just looked on Amazon and I can still get either a download only version or a box with disks in it. I just remember having grief finding a box with disks in it when last I looked.
It must be. All I could find now on the missing features by performing a quick search was this statement on an Elements 2019 FAQ page:
What features from previous versions are not available in Photoshop Elements 2019?
A handful of features from previous versions are not available in Photoshop Elements 2019 due to new product support for 64-bit systems. They include: - Photo Mail - Photomerge Style - MatchMagic Extractor tool - Texture FillFrame from video - Interactive layout mode in Photomerge Panorama - Photoshop Showcase