I have the 24 PH and I am reading it straight through, I am up to the wizard class so not even half way there yet. I have no current plans to get the 24 DMG and MM, it is all supposed to be compatible with my 14 versions and I have a ton of 3rd party monster books I enjoy so if I adopt the 24 PHB stuff for my next campaign once I have gone through it (not a given, I have the 14 stuff in FG and I have not heard of any of my face to face people besides me having gotten the new PH), it will be a mixed 14/24 game.
Which should be no problem, I went through the 1e-2e transition with allowing 1e and 2e PH stuff and using my 1e DMG and monster books (eventually getting some 2e ones like the Ravenloft compendiums during the 2e era but not the core ones).