I love my HMR and thought that the 17 WSM would be nifty, but I didn't find the initial rifle offerings compelling, and then sort of lost interest. I'm sure not quite fitting in the vast majority of pre-existing rimfire platforms hasn't helped the popularity growth of the WSM.
Perhaps there is a lot of hunting and shooting that escapes my experience
, but I make a real effort to limit my layers of cartridge redundancy and streamline my logistics. I understand that the WSM is ballistically different, but in terms of actual application, I don't really have a use for the WSM now that can't be covered very well by the 22lr, 17 HMR or .223 Rem. I'm not a serious prarie dogger, when I go, I usually use .223, although 17 HMR and silenced .22 lr is fun at times too. Rabbits get a .22 pill through the head, not very challenging given the gazillion rabbits around here. When I just want to shoot something accurate at shorter ranges without having to worry about spending time reloading, I take my HMR.
Getting a 17 WSM rifle would be neat, but not as useful for me as buying a couple thousand more bullets for rifles I already have, more jugs of powder, more cases, a better bipod, another suppressor, better scopes, etc. Given my infinite wants and finite funds and free time, I'm trying to get away from buying neat stuff just because it's neat.
I suspect that a lot of shooters and hunters are in a similar situation. If you want one though and feel it would address a need you have, I say go for it, there's never a shortage of 17 WSM ammo at my local Sportsman's Warehouse.