Cartridges come and go and are a lifeblood of new gun sales for the manufacturers.
I welcomed the WSM magnums as I don't prefer belted magnums for handloading. I have had belted mags. since the 50's.
The 7mm WSM is a current favorite of mine and I have one ready. However the 30-06 is just fine and thats what I use most for game shooting as that's what a favorite rifle is chambered for.
They even bring back cartridges that had died out.
It's all fun for us to talk about.