yeah but consider that pathfinder races are all recoloured humans, 10 tieflign subraces dont realy matter if they all look like humans with horns glued to their forehead adn get different statboni.
Much the same is true for classes.
Pathfidner is esssentialy 3.5 , a lot of classes share the same spells, implementing a new class is a matter of inserting values into a spreadsheet half the time and balancign isnt an issue when you 1:1 copy an already existing rulebook
5e isn't that different then 3.5 when it comes to class common ground. Many spells shared between classes. A few shared features like Channel Divinity.
