Over here in the UK, we have a much greater and historically longer interest in 6.5mm, largely thanks to the 6.5X55mm. I got my first one some 25-30 years ago, a mint secondhand Parker-Hale M81 Classic. The M81 Classic is reckoned by many to be the best of the long run of 20th century P-H sporting rifles, and the 6.5X55 was one of its best chamberings for both UK deer species and general shooting.
Surplus Swedish Mauser military rifles aside (which are likely still our number one choice for Historic Arms competition shooting), there has long been significant use of the 6.5X55 in our deerstalking, and if anything interest and use have increased in recent years. The advent of the Creedmoor has sharpened that interest a bit, but neither increased nor diminished its use to any great extent. Factory ammunition is very widely available for the 6.5X55 here and this has been a significant factor in its popularity. The big loser has been 260 Remington, especially as factory ammo had become both scarce and expensive even before the Creedmoor arrived. 7mm-08 is probably overall another loser despite having a small base of ardent fans.
The other factor in all this here is the 6.5X47 Lapua which has carved a niche for itself as a multi-role number among those who handload. Most British deer species are on the small side and the 6.5X47L is more than adequate for them. The Creedmoor plus the steady move to compulsory use of non-lead bullets in field shooting may weaken its position however.