D&D became streamlined down to attract retard dollars. That's basically all it is now. Sell as many books as possible to people less intelligent than me (or you, or whatever).
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Let's just take a minute to think about this. 3.5e has so many goddamn sourcebooks its not even funny.
I'll just name the ones I PERSONALLY own:
Players Handbook
Monster Manual
Dungeon Master's Guide
Players Handbook II
Complete Arcane
Complete Divine
Complete Scoundrel
Stormwrack
Manual of the Planes
Unearthed Arcana
Plus one or two I can't find in a cursory examination.
A preliminary look at the price tags on the sourcebooks reveals I've spent ~300$ on these things. And there's more. LOTS more. If we're ragging on WotC trying to get people's "retard dollars" by selling as many books as possible, 3e is the guilty edition here. Not that 4e didn't have far too many sourcebooks too, but there's quite a bit less of them[If only because no one would buy them]. 5e, at the moment, has THREE [Overpriced, to be fair]sourcebooks. I know which edition *I'D* condemn for trying to get "retard dollars". Especially since half the stuff in the auxiliary 3.5e sourcebooks is broken as fuck if used right. 4e wasn't them trying to make an "arcade game for retards", it was them trying to sweep 3.5 under the rug and build a coherently balanced and consistent game system. 5e is them trying to sweep 4e under the rug and build a coherently balanced and consistent game system while still retaining satisfactory shenanigan potential. I think they did a decent enough job, personally, although I still mostly play 3.5e.
4 and 5 are soulless cash ins with no respect to the original material and a strong bias towards MMORPG children who have no concept of what the term 'Role-playing' even means.
This.
Not that I don't dislike RPG being used for games which involve little actual roleplaying[Looking at you, Elder Scrolls], but this is a highly silly statement. I'm fairly certain that role-playing means "Playing a role". What this has to do with the rules surrounding the areas pure role-playing can't always satisfactorily decide, I have no idea. Whether you have spells per day or daily powers, you can do the same amount of role-playing either way.