That's not a substitute.
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We've had standard "Click, Attack, Wait" MMORPGs since the beginning (TERA would be included in this). Open-World Action MMORPGs still aren't a thing, and ooh...ugh. There's not really a demand for them, either, which is a shame. I think the closest thing we've had in recent years is ESO, but I don't really follow that so I couldn't say for sure.