JRRNeiklot
First Post
Advanced Dungeons & Dragons Third Edition.
That's essentially what Next is which means, generally speaking, that it's a simpler version of D&D (compared to 3.xE and 4E) that could have been designed in 1999, although there are a few modern (3.xE- and 4E-inspired) touches.
If you want an older school and thus rules-lighter (not necessarily rules light, but YMMV) then Next is for you. If you want a slightly updated version of Advanced Dungeons & Dragons that you can use to run old school AD&D adventures with minimal modification then Next is for you. (Personally speaking, I think this is the only attraction of the game.)
Simpler than 3e/4e, maybe, but I don't get an AD&D vibe at all. I see Next as a lower powered version of 3e. Nothing Old School about it.