D&D 5th Editon Discussion: 6th thread and counting

[Yora]

The day the 3.0 Player Handbook was on bookshelves.

In AD&D, you rolled your stats, picked your race and PHB class, and that was it. You might later gain proficiency to more weapons or improve your proficiency level with existing ones, but the number of proficiency points was fixed. Everything else was customizing equipment.
And then 3rd Edition had the great idea of introducing PrCs and Feats and putting lots of new Classes, PrCs, and Feats into every single book.

It can be contained in 5th Edition, simply by not putting feats, races and classes into every book but keep the game limited to the PHB races and classes and main campaign setting books.
But that would be the opposite of the entire business model of 3rd and 4th Edition.