Not many have jumped on board and chamber a gun in 17 Hornady Hornet, either, but that cartridge seems to be holding its own.
I still have a couple HMR's but if it weren't for the fact I have almost 8 thousand rounds of HMR ammo, I doubt I'd still own an HMR because my WSM does everything the HMR can do, just better.
Personally, I think a 20 WSM shooting the Hornady 24gr NTX bullet around 3000fps would have been much more popular and filled a gap, better, between the rimfire and small caliber centerfire rifles. The 17 HMR has become such a popular rimfire that, IMO, they would have been better off going to a 20 WSM instead of the 17 WSM so it could/would seperate itself, further, from the 17 HMR. Then when CCI came out with their A17 ammo, oh boy, that really confused a bunch of people. I've been in gun shops on multiple occasions when the counter person was explaining to a customer that the 17 WSM was a completely different cartridge and that the A17 was just a faster shooting 17 HMR ammo.