DNG pros and cons
+1 to what birdpix said but it isn't just DNG. If you save a layered TIFF or PSD from Photoshop you can't open the file with all the layers intact with non-Adobe editor programs.
Adobe has said that they don't have any plans now to make Lightroom and Photoshop Elements cloud based only but a few years ago they could have said the same thing about Photoshop CS.
What to do is the dilemma we are all facing.
Living and loving it in Bangkok, Thailand. Canon 7D - See the gear list for the rest.