OSRS was never WoW size huge, plus no one cares enough to shit pot about that game ""dying"", as no /v/ zoomer plays it.
WoW Classic meanwhile fuels the avrg zoomers love for hating things, making it easy to hate and talk shit about it, even tho it's still very fucking alive.
modern /v/s definition of "dead" means "anything that isn't in the top 10 of steam", and even that isn't good enough.