Jim has a 2009 iMac. He's thinking about buying a new one, or wait for the new Apple Silicon models? Leo says if you need it now, go get a new iMac. Leo doesn't think the Apple Silicon iMacs will be out for at least a year and Apple will be supporting Intel macs for "years to come." So there's no reason to wait.
Also, should you buy the first version of anything? You can get one next time around.