If by “dead” one means a lack of brass and factory loads, then all the wsm’s are dead. Covid shutdowns was the nail in the coffin. The vast majority of hunters and shooters do not reload, or so says the online stuff I read. Who wants a wsm when you can’t find a rifle so chambered and dam sure can’t find ammo. Then consider what is available now. My lone Walmart has stacks of 270 win, 308, 30-06 ammo and a local sporting goods store has a few rifles in the same chamberings. If one reloads ammo is a non issue, but most don’t. I had a 300 wsm as a dedicated elk rifle. It killed 2 or 3 elk just fine, but no better than the 30-06 it replaced, so I sold it. Seems to me it all comes down to what the ammo manufacturers are producing. From where I sit, and what’s available in my area, the wsm’s are dead. Ymmv
