Why they are not popular
1. They are competing against MUCH competition who has saturated the market with guns and advertising, while they did not.
2. People want support and really want ooodles of accessories - this is not there - Glock accessories might as well be at Walmart. XD is picking up, and SW ain't far behind, etc. Mags ain't cheap - most will pay $30 a piece before shipping. I lucked out on Gunbroker for a couple.
3. Just not much print/web out there on it. Go to the Steyr site - its been down for three days (just when my gun broke).
I have an M9A1. It is a WAYYYY COOOL gun. But, it had trigger "stacking". Tried polishing the striker spring assembly - no luck. Firing pin broke from dry firing it. Steyr was on it, and sent me a new assembly pronto. Then Upon reassembly it would not reset the trigger - I cleaned the assembly again, was careful about the trigger bar, and it works again. Trigger not quite as crisp, but the initial takeup is smoother and more consistent with new striker. Overall, fit and finish is excellent. Look on par with Glock and new XD. You MIGHT find the trigger as good and MAYBE better than Glock - some have. I'm not sure about mine until I shoot it again. But, it IS better than my XD trigger. I like the OD slide - it looks cool - don't know if it will wear as good as a 3rd Gen Glock though. You CAN take the whole thing down to the trigger/inner subassembly in minutes and hose everything out easily. You can field strip it in seconds - easiest gun out there. I like the sights, but it takes some getting used to. I have old eyes, and the big triangle is decent. Wish the triangles came in H^3. When you pick one up, the ergos will make you want it!
My son has a G19. Great gun. Lighter. I find no difference in recoil - some claim it (Steyr) feels like a 22 in recoil - not me. It does have a lower bore axis, but doesn't feel any better to me. BUT - it does well, and shoots well. If I had ONE gun, I'd probably get a G19 - because it is proven, lighter, a bit simpler, and support is out the yingyang. And this is the rub, and why they aren't everywhere. I have other guns, and I like different (I have CZs and Macs) so no biggee.
It IS very cool. The stout inner trigger/rail piece seems sound. SAI WILL support this gun - they sent the parts to me asap and are good on the phone, and fun to deal with. They are accurate and reliable from what I can tell, and the case head support is ABSOLUTELY the best I have seen on ANY firearm. They feel great in picking them up - they are the HP of the tupperware crowd - thin grip and it forces your hand high. I MAY put some skateboard tape on, but might NOT have to. Trigger can be quite good, and if someone does some work on them, it might be the best in a striker gun. BUT... no one does them to my knowledge. For me, it is good for now.
I sure hope the Steyr site comes back up...