Reading [this gaming industry retrospective](http://www.rpg.net/columns/designers-and-dragons/designers-and-dragons27.phtml) I ran into a few phrases which confused me.

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> The d20 bust caused by 3.5e (2003) and the over-saturation of d20 products ran right into the Great Recession.
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**What's "the d20 bust"?** I came into RPGs shortly after 3.5's release, so I can't compare before and after. It seems to me like the d20 System was dominating the conversation for most of that decade, and that doesn't sound very bust-like.

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> [...] a lot of different publishers seem to be succeeding with a lot of different sorts of games. Pathfinder and Mutants & Masterminds show that post-d20 games can still do well [...]
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If you show me the phrase "post-d20 games" on its own, I'd think it was describing games which learned from the d20 System's decade of development and designed new non-d20 games building on that insight. But since Pathfinder and Mutants & Masterminds are both self-evidently games in the d20 System family, I'd clearly be wrong about that. **What does it mean to describe these systems as "post-d20 games"?**