How about Cloth Physicks?

[Felis]

You just said it yourself - TEN YEARS! That means that at least some of the design or system is a decade old. That's one of the issues with FFXIV too in my opinion, it's using an engine that's from 2007 (Crystal Tools) which itself began creation in 2005 for FFXIV on DX 9.0c.

1.0 used Crystal Tool, not ARR. The devs changed the engine for the rebuild.