This doesn't track with actual game releases, on the contrary it tends to be smaller/simpler games that release exclusively digitally and the big triple A games continue to release physical discs.

As far as bugs go, the solution for this has been and continues to be that after you install the game from the disc, you download a patch to update it. It's been this way for almost 20 years now (XBox 360 and PS3 both launched with explicit support for this).