In the last twenty years, the 7mm08 is probably one of the top ten calibers sold in deer hunting rifles. Most that bought them are very happy and will continue to use them. Only shooters that got to have the latest greatest will replace them with a Creedmoor. I have been hearing the same thing said about the 30 30 for 50 years and each deer season you see 30 30 ammo on sale everywhere.
I don't personally see the 6.5 Creedmoor and 7mm08 as the same. I see them as complementing each other as the 6mm Creedmoor does on the other end!
6mm 108gr, 6.5mm 140ish gr, 7mm 168 to 180gr. There is a place for all three in my opinion.
